These messages are classified as follows (listed in increasing order of
desperation):
The majority of messages from the first three classifications above
(W, D & S) can be controlled using the warnings pragma.
Default warnings are always enabled unless they are explicitly disabled
with the warnings pragma or the -X switch.
The messages are in alphabetical order, without regard to upper or
lower-case. Some of these messages are generic. Spots that vary are
denoted with a %s or other printf-style escape. These escapes are
ignored by the alphabetical order, as are all characters other than
letters. To look up your message, just ignore anything that is not a
letter.
accept() on closed socket %s
-
(W closed) You tried to do an accept on a closed socket. Did you forget
to check the return value of your socket() call? See
accept in the perlfunc manpage.
- Allocation too large: %lx
-
(X) You can't allocate more than 64K on an MS-DOS machine.
- '!' allowed only after types %s
-
(F) The '!' is allowed in pack() or unpack() only after certain types.
See pack in the perlfunc manpage.
- Ambiguous call resolved as CORE::%s(), qualify as such or use &
-
(W ambiguous) A subroutine you have declared has the same name as a Perl
keyword, and you have used the name without qualification for calling
one or the other. Perl decided to call the builtin because the
subroutine is not imported.
-
To force interpretation as a subroutine call, either put an ampersand
before the subroutine name, or qualify the name with its package.
Alternatively, you can import the subroutine (or pretend that it's
imported with the use subs pragma).
-
To silently interpret it as the Perl operator, use the CORE:: prefix
on the operator (e.g. CORE::log($x)) or declare the subroutine
to be an object method (see Subroutine Attributes in the perlsub manpage or
the attributes manpage).
- Ambiguous range in transliteration operator
-
(F) You wrote something like tr/a-z-0// which doesn't mean anything at
all. To include a - character in a transliteration, put it either
first or last. (In the past, tr/a-z-0// was synonymous with
tr/a-y//, which was probably not what you would have expected.)
- Ambiguous use of %s resolved as %s
-
(W ambiguous)(S) You said something that may not be interpreted the way
you thought. Normally it's pretty easy to disambiguate it by supplying
a missing quote, operator, parenthesis pair or declaration.
- '|' and '<' may not both be specified on command line
-
(F) An error peculiar to VMS. Perl does its own command line
redirection, and found that STDIN was a pipe, and that you also tried to
redirect STDIN using '<'. Only one STDIN stream to a customer, please.
- '|' and '>' may not both be specified on command line
-
(F) An error peculiar to VMS. Perl does its own command line
redirection, and thinks you tried to redirect stdout both to a file and
into a pipe to another command. You need to choose one or the other,
though nothing's stopping you from piping into a program or Perl script
which 'splits' output into two streams, such as
-
open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!";
while (<STDIN>) {
print;
print OUT;
}
close OUT;
- Applying %s to %s will act on
scalar(%s)
-
(W misc) The pattern match (//), substitution (s///), and
transliteration (tr///) operators work on scalar values. If you apply
one of them to an array or a hash, it will convert the array or hash to
a scalar value -- the length of an array, or the population info of a
hash -- and then work on that scalar value. This is probably not what
you meant to do. See grep in the perlfunc manpage and map in the perlfunc manpage for
alternatives.
- Args must match #! line
-
(F) The setuid emulator requires that the arguments Perl was invoked
with match the arguments specified on the #! line. Since some systems
impose a one-argument limit on the #! line, try combining switches;
for example, turn -w -U into -wU.
- Arg too short for msgsnd
-
(F) msgsnd() requires a string at least as long as sizeof(long).
- %s argument is not a HASH or ARRAY element
-
(F) The argument to exists() must be a hash or array element, such as:
-
$foo{$bar}
$ref->{"susie"}[12]
- %s argument is not a HASH or ARRAY element or slice
-
(F) The argument to delete() must be either a hash or array element,
such as:
-
$foo{$bar}
$ref->{"susie"}[12]
-
or a hash or array slice, such as:
-
@foo[$bar, $baz, $xyzzy]
@{$ref->[12]}{"susie", "queue"}
- %s argument is not a subroutine name
-
(F) The argument to exists() for exists &sub must be a subroutine
name, and not a subroutine call. exists &sub() will generate this
error.
- Argument "%s" isn't numeric%s
-
(W numeric) The indicated string was fed as an argument to an operator
that expected a numeric value instead. If you're fortunate the message
will identify which operator was so unfortunate.
- Argument list not closed for PerlIO layer "%s"
-
(W layer) When pushing a layer with arguments onto the Perl I/O system you
forgot the ) that closes the argument list. (Layers take care of transforming
data between external and internal representations.) Perl stopped parsing
the layer list at this point and did not attempt to push this layer.
If your program didn't explicitly request the failing operation, it may be
the result of the value of the environment variable PERLIO.
- Array @%s missing the @ in argument %d of %s()
-
(D deprecated) Really old Perl let you omit the @ on array names in some
spots. This is now heavily deprecated.
- assertion botched: %s
-
(P) The malloc package that comes with Perl had an internal failure.
- Assertion failed: file "%s"
-
(P) A general assertion failed. The file in question must be examined.
- Assignment to both a list and a scalar
-
(F) If you assign to a conditional operator, the 2nd and 3rd arguments
must either both be scalars or both be lists. Otherwise Perl won't
know which context to supply to the right side.
- A thread exited while %d threads were running
-
(W threads)(S) When using threaded Perl, a thread (not necessarily the main
thread) exited while there were still other threads running.
Usually it's a good idea to first collect the return values of the
created threads by joining them, and only then exit from the main
thread. See the threads manpage.
- Attempt to access disallowed key '%s' in a restricted hash
-
(F) The failing code has attempted to get or set a key which is not in
the current set of allowed keys of a restricted hash.
- Attempt to bless into a reference
-
(F) The CLASSNAME argument to the bless() operator is expected to be
the name of the package to bless the resulting object into. You've
supplied instead a reference to something: perhaps you wrote
-
bless $self, $proto;
-
when you intended
-
bless $self, ref($proto) || $proto;
-
If you actually want to bless into the stringified version
of the reference supplied, you need to stringify it yourself, for
example by:
-
bless $self, "$proto";
- Attempt to delete disallowed key '%s' from a restricted hash
-
(F) The failing code attempted to delete from a restricted hash a key
which is not in its key set.
- Attempt to delete readonly key '%s' from a restricted hash
-
(F) The failing code attempted to delete a key whose value has been
declared readonly from a restricted hash.
- Attempt to free non-arena SV: 0x%lx
-
(P internal) All SV objects are supposed to be allocated from arenas
that will be garbage collected on exit. An SV was discovered to be
outside any of those arenas.
- Attempt to free nonexistent shared string
-
(P internal) Perl maintains a reference counted internal table of
strings to optimize the storage and access of hash keys and other
strings. This indicates someone tried to decrement the reference count
of a string that can no longer be found in the table.
- Attempt to free temp prematurely
-
(W debugging) Mortalized values are supposed to be freed by the
free_tmps() routine. This indicates that something else is freeing the
SV before the free_tmps() routine gets a chance, which means that the
free_tmps() routine will be freeing an unreferenced scalar when it does
try to free it.
- Attempt to free unreferenced glob pointers
-
(P internal) The reference counts got screwed up on symbol aliases.
- Attempt to free unreferenced scalar
-
(W internal) Perl went to decrement the reference count of a scalar to
see if it would go to 0, and discovered that it had already gone to 0
earlier, and should have been freed, and in fact, probably was freed.
This could indicate that SvREFCNT_dec() was called too many times, or
that SvREFCNT_inc() was called too few times, or that the SV was
mortalized when it shouldn't have been, or that memory has been
corrupted.
- Attempt to join self
-
(F) You tried to join a thread from within itself, which is an
impossible task. You may be joining the wrong thread, or you may need
to move the join() to some other thread.
- Attempt to pack pointer to temporary value
-
(W pack) You tried to pass a temporary value (like the result of a
function, or a computed expression) to the "p" pack() template. This
means the result contains a pointer to a location that could become
invalid anytime, even before the end of the current statement. Use
literals or global values as arguments to the "p" pack() template to
avoid this warning.
- Attempt to set length of freed array
-
(W) You tried to set the length of an array which has been freed. You
can do this by storing a reference to the scalar representing the last index
of an array and later assigning through that reference. For example
-
$r = do {my @a; \$#a};
$$r = 503
- Attempt to use reference as lvalue in substr
-
(W substr) You supplied a reference as the first argument to substr()
used as an lvalue, which is pretty strange. Perhaps you forgot to
dereference it first. See substr in the perlfunc manpage.
- Bad arg length for %s, is %d, should be %s
-
(F) You passed a buffer of the wrong size to one of msgctl(), semctl()
or shmctl(). In C parlance, the correct sizes are, respectively,
sizeof(struct msqid_ds *), sizeof(struct semid_ds *), and
sizeof(struct shmid_ds *).
- Bad evalled substitution pattern
-
(F) You've used the /e switch to evaluate the replacement for a
substitution, but perl found a syntax error in the code to evaluate,
most likely an unexpected right brace '}'.
- Bad filehandle: %s
-
(F) A symbol was passed to something wanting a filehandle, but the
symbol has no filehandle associated with it. Perhaps you didn't do an
open(), or did it in another package.
- Bad
free() ignored
-
(S malloc) An internal routine called free() on something that had never
been malloc()ed in the first place. Mandatory, but can be disabled by
setting environment variable PERL_BADFREE to 0.
-
This message can be seen quite often with DB_File on systems with "hard"
dynamic linking, like AIX and OS/2. It is a bug of Berkeley DB
which is left unnoticed if DB uses forgiving system malloc().
- Bad hash
-
(P) One of the internal hash routines was passed a null HV pointer.
- Bad index while coercing array into hash
-
(F) The index looked up in the hash found as the 0'th element of a
pseudo-hash is not legal. Index values must be at 1 or greater.
See the perlref manpage.
- Badly placed ()'s
-
(A) You've accidentally run your script through csh instead
of Perl. Check the #! line, or manually feed your script into
Perl yourself.
- Bad name after %s::
-
(F) You started to name a symbol by using a package prefix, and then
didn't finish the symbol. In particular, you can't interpolate outside
of quotes, so
-
$var = 'myvar';
$sym = mypack::$var;
-
is not the same as
-
$var = 'myvar';
$sym = "mypack::$var";
- Bad
realloc() ignored
-
(S malloc) An internal routine called realloc() on something that had
never been malloc()ed in the first place. Mandatory, but can be disabled
by setting environment variable PERL_BADFREE to 1.
- Bad symbol for array
-
(P) An internal request asked to add an array entry to something that
wasn't a symbol table entry.
- Bad symbol for dirhandle
-
(P) An internal request asked to add a dirhandle entry to something
that wasn't a symbol table entry.
- Bad symbol for filehandle
-
(P) An internal request asked to add a filehandle entry to something
that wasn't a symbol table entry.
- Bad symbol for hash
-
(P) An internal request asked to add a hash entry to something that
wasn't a symbol table entry.
- Bareword found in conditional
-
(W bareword) The compiler found a bareword where it expected a
conditional, which often indicates that an || or && was parsed as part
of the last argument of the previous construct, for example:
-
open FOO || die;
-
It may also indicate a misspelled constant that has been interpreted as
a bareword:
-
use constant TYPO => 1;
if (TYOP) { print "foo" }
-
The strict pragma is useful in avoiding such errors.
- Bareword "%s" not allowed while "strict subs" in use
-
(F) With "strict subs" in use, a bareword is only allowed as a
subroutine identifier, in curly brackets or to the left of the "=>"
symbol. Perhaps you need to predeclare a subroutine?
- Bareword "%s" refers to nonexistent package
-
(W bareword) You used a qualified bareword of the form Foo::, but the
compiler saw no other uses of that namespace before that point. Perhaps
you need to predeclare a package?
- BEGIN failed--compilation aborted
-
(F) An untrapped exception was raised while executing a BEGIN
subroutine. Compilation stops immediately and the interpreter is
exited.
- BEGIN not safe after errors--compilation aborted
-
(F) Perl found a BEGIN {} subroutine (or a use directive, which
implies a BEGIN {}) after one or more compilation errors had already
occurred. Since the intended environment for the BEGIN {} could not
be guaranteed (due to the errors), and since subsequent code likely
depends on its correct operation, Perl just gave up.
- \1 better written as $1
-
(W syntax) Outside of patterns, backreferences live on as variables.
The use of backslashes is grandfathered on the right-hand side of a
substitution, but stylistically it's better to use the variable form
because other Perl programmers will expect it, and it works better if
there are more than 9 backreferences.
- Binary number > 0b11111111111111111111111111111111 non-portable
-
(W portable) The binary number you specified is larger than 2**32-1
(4294967295) and therefore non-portable between systems. See
the perlport manpage for more on portability concerns.
bind() on closed socket %s
-
(W closed) You tried to do a bind on a closed socket. Did you forget to
check the return value of your socket() call? See bind in the perlfunc manpage.
binmode() on closed filehandle %s
-
(W unopened) You tried binmode() on a filehandle that was never opened.
Check you control flow and number of arguments.
- Bit vector size > 32 non-portable
-
(W portable) Using bit vector sizes larger than 32 is non-portable.
- Bizarre copy of %s in %s
-
(P) Perl detected an attempt to copy an internal value that is not
copyable.
- Buffer overflow in prime_env_iter: %s
-
(W internal) A warning peculiar to VMS. While Perl was preparing to
iterate over %ENV, it encountered a logical name or symbol definition
which was too long, so it was truncated to the string shown.
- Callback called exit
-
(F) A subroutine invoked from an external package via call_sv()
exited by calling exit.
- %s() called too early to check prototype
-
(W prototype) You've called a function that has a prototype before the
parser saw a definition or declaration for it, and Perl could not check
that the call conforms to the prototype. You need to either add an
early prototype declaration for the subroutine in question, or move the
subroutine definition ahead of the call to get proper prototype
checking. Alternatively, if you are certain that you're calling the
function correctly, you may put an ampersand before the name to avoid
the warning. See the perlsub manpage.
- Cannot compress integer in pack
-
(F) An argument to pack("w",...) was too large to compress. The BER
compressed integer format can only be used with positive integers, and you
attempted to compress Infinity or a very large number (> 1e308).
See pack in the perlfunc manpage.
- Cannot compress negative numbers in pack
-
(F) An argument to pack("w",...) was negative. The BER compressed integer
format can only be used with positive integers. See pack in the perlfunc manpage.
- Cannot convert a reference to %s to typeglob
-
(F) You manipulated Perl's symbol table directly, stored a reference in it,
then tried to access that symbol via conventional Perl syntax. The access
triggers Perl to autovivify that typeglob, but it there is no legal conversion
from that type of reference to a typeglob.
- Can only compress unsigned integers in pack
-
(F) An argument to pack("w",...) was not an integer. The BER compressed
integer format can only be used with positive integers, and you attempted
to compress something else. See pack in the perlfunc manpage.
- Can't bless non-reference value
-
(F) Only hard references may be blessed. This is how Perl "enforces"
encapsulation of objects. See the perlobj manpage.
- Can't call method "%s" in empty package "%s"
-
(F) You called a method correctly, and it correctly indicated a package
functioning as a class, but that package doesn't have ANYTHING defined
in it, let alone methods. See the perlobj manpage.
- Can't call method "%s" on an undefined value
-
(F) You used the syntax of a method call, but the slot filled by the
object reference or package name contains an undefined value. Something
like this will reproduce the error:
-
$BADREF = undef;
process $BADREF 1,2,3;
$BADREF->process(1,2,3);
- Can't call method "%s" on unblessed reference
-
(F) A method call must know in what package it's supposed to run. It
ordinarily finds this out from the object reference you supply, but you
didn't supply an object reference in this case. A reference isn't an
object reference until it has been blessed. See the perlobj manpage.
- Can't call method "%s" without a package or object reference
-
(F) You used the syntax of a method call, but the slot filled by the
object reference or package name contains an expression that returns a
defined value which is neither an object reference nor a package name.
Something like this will reproduce the error:
-
$BADREF = 42;
process $BADREF 1,2,3;
$BADREF->process(1,2,3);
- Can't chdir to %s
-
(F) You called perl -x/foo/bar, but /foo/bar is not a directory
that you can chdir to, possibly because it doesn't exist.
- Can't check filesystem of script "%s" for nosuid
-
(P) For some reason you can't check the filesystem of the script for
nosuid.
- Can't coerce array into hash
-
(F) You used an array where a hash was expected, but the array has no
information on how to map from keys to array indices. You can do that
only with arrays that have a hash reference at index 0.
- Can't coerce %s to integer in %s
-
(F) Certain types of SVs, in particular real symbol table entries
(typeglobs), can't be forced to stop being what they are. So you can't
say things like:
-
*foo += 1;
-
You CAN say
-
$foo = *foo;
$foo += 1;
-
but then $foo no longer contains a glob.
- Can't coerce %s to number in %s
-
(F) Certain types of SVs, in particular real symbol table entries
(typeglobs), can't be forced to stop being what they are.
- Can't coerce %s to string in %s
-
(F) Certain types of SVs, in particular real symbol table entries
(typeglobs), can't be forced to stop being what they are.
- Can't create pipe mailbox
-
(P) An error peculiar to VMS. The process is suffering from exhausted
quotas or other plumbing problems.
- Can't declare class for non-scalar %s in "%s"
-
(F) Currently, only scalar variables can be declared with a specific
class qualifier in a "my" or "our" declaration. The semantics may be
extended for other types of variables in future.
- Can't declare %s in "%s"
-
(F) Only scalar, array, and hash variables may be declared as "my" or
"our" variables. They must have ordinary identifiers as names.
- Can't do inplace edit: %s is not a regular file
-
(S inplace) You tried to use the -i switch on a special file, such as
a file in /dev, or a FIFO. The file was ignored.
- Can't do inplace edit on %s: %s
-
(S inplace) The creation of the new file failed for the indicated
reason.
- Can't do inplace edit without backup
-
(F) You're on a system such as MS-DOS that gets confused if you try
reading from a deleted (but still opened) file. You have to say
-i.bak, or some such.
- Can't do inplace edit: %s would not be unique
-
(S inplace) Your filesystem does not support filenames longer than 14
characters and Perl was unable to create a unique filename during
inplace editing with the -i switch. The file was ignored.
- Can't do {n,m} with n > m in regex; marked by <-- HERE in m/%s/
-
(F) Minima must be less than or equal to maxima. If you really want your
regexp to match something 0 times, just put {0}. The <-- HERE shows in the
regular expression about where the problem was discovered. See the perlre manpage.
- Can't do setegid!
-
(P) The setegid() call failed for some reason in the setuid emulator of
suidperl.
- Can't do seteuid!
-
(P) The setuid emulator of suidperl failed for some reason.
- Can't do setuid
-
(F) This typically means that ordinary perl tried to exec suidperl to do
setuid emulation, but couldn't exec it. It looks for a name of the form
sperl5.000 in the same directory that the perl executable resides under
the name perl5.000, typically /usr/local/bin on Unix machines. If the
file is there, check the execute permissions. If it isn't, ask your
sysadmin why he and/or she removed it.
- Can't do waitpid with flags
-
(F) This machine doesn't have either waitpid() or wait4(), so only
waitpid() without flags is emulated.
- Can't emulate -%s on #! line
-
(F) The #! line specifies a switch that doesn't make sense at this
point. For example, it'd be kind of silly to put a -x on the #!
line.
- Can't exec "%s": %s
-
(W exec) A system(), exec(), or piped open call could not execute the
named program for the indicated reason. Typical reasons include: the
permissions were wrong on the file, the file wasn't found in
$ENV{PATH}, the executable in question was compiled for another
architecture, or the #! line in a script points to an interpreter that
can't be run for similar reasons. (Or maybe your system doesn't support
#! at all.)
- Can't exec %s
-
(F) Perl was trying to execute the indicated program for you because
that's what the #! line said. If that's not what you wanted, you may
need to mention "perl" on the #! line somewhere.
- Can't execute %s
-
(F) You used the -S switch, but the copies of the script to execute
found in the PATH did not have correct permissions.
- Can't find an opnumber for "%s"
-
(F) A string of a form CORE::word was given to prototype(), but there
is no builtin with the name word.
- Can't find %s character property "%s"
-
(F) You used \p{} or \P{} but the character property by that name
could not be found. Maybe you misspelled the name of the property
(remember that the names of character properties consist only of
alphanumeric characters), or maybe you forgot the Is or In prefix?
- Can't find label %s
-
(F) You said to goto a label that isn't mentioned anywhere that it's
possible for us to go to. See goto in the perlfunc manpage.
- Can't find %s on PATH
-
(F) You used the -S switch, but the script to execute could not be
found in the PATH.
- Can't find %s on PATH, '.' not in PATH
-
(F) You used the -S switch, but the script to execute could not be
found in the PATH, or at least not with the correct permissions. The
script exists in the current directory, but PATH prohibits running it.
- Can't find string terminator %s anywhere before EOF
-
(F) Perl strings can stretch over multiple lines. This message means
that the closing delimiter was omitted. Because bracketed quotes count
nesting levels, the following is missing its final parenthesis:
-
print q(The character '(' starts a side comment.);
-
If you're getting this error from a here-document, you may have included
unseen whitespace before or after your closing tag. A good programmer's
editor will have a way to help you find these characters.
- Can't find Unicode property definition "%s"
-
(F) You may have tried to use \p which means a Unicode property (for
example \p{Lu} is all uppercase letters). If you did mean to use a
Unicode property, see the perlunicode manpage for the list of known properties.
If you didn't mean to use a Unicode property, escape the \p, either
by \\p (just the \p) or by \Q\p (the rest of the string, until
possible \E).
- Can't fork
-
(F) A fatal error occurred while trying to fork while opening a
pipeline.
- Can't get filespec - stale stat buffer?
-
(S) A warning peculiar to VMS. This arises because of the difference
between access checks under VMS and under the Unix model Perl assumes.
Under VMS, access checks are done by filename, rather than by bits in
the stat buffer, so that ACLs and other protections can be taken into
account. Unfortunately, Perl assumes that the stat buffer contains all
the necessary information, and passes it, instead of the filespec, to
the access checking routine. It will try to retrieve the filespec using
the device name and FID present in the stat buffer, but this works only
if you haven't made a subsequent call to the CRTL stat() routine,
because the device name is overwritten with each call. If this warning
appears, the name lookup failed, and the access checking routine gave up
and returned FALSE, just to be conservative. (Note: The access checking
routine knows about the Perl stat operator and file tests, so you
shouldn't ever see this warning in response to a Perl command; it arises
only if some internal code takes stat buffers lightly.)
- Can't get pipe mailbox device name
-
(P) An error peculiar to VMS. After creating a mailbox to act as a
pipe, Perl can't retrieve its name for later use.
- Can't get SYSGEN parameter value for MAXBUF
-
(P) An error peculiar to VMS. Perl asked $GETSYI how big you want your
mailbox buffers to be, and didn't get an answer.
- Can't "goto" into the middle of a foreach loop
-
(F) A "goto" statement was executed to jump into the middle of a foreach
loop. You can't get there from here. See goto in the perlfunc manpage.
- Can't "goto" out of a pseudo block
-
(F) A "goto" statement was executed to jump out of what might look like
a block, except that it isn't a proper block. This usually occurs if
you tried to jump out of a sort() block or subroutine, which is a no-no.
See goto in the perlfunc manpage.
- Can't goto subroutine from a sort sub (or similar callback)
-
(F) The "goto subroutine" call can't be used to jump out of the
comparison sub for a sort(), or from a similar callback (such
as the reduce() function in List::Util).
- Can't goto subroutine from an eval-%s
-
(F) The "goto subroutine" call can't be used to jump out of an eval
"string" or block.
- Can't goto subroutine outside a subroutine
-
(F) The deeply magical "goto subroutine" call can only replace one
subroutine call for another. It can't manufacture one out of whole
cloth. In general you should be calling it out of only an AUTOLOAD
routine anyway. See goto in the perlfunc manpage.
- Can't ignore signal CHLD, forcing to default
-
(W signal) Perl has detected that it is being run with the SIGCHLD
signal (sometimes known as SIGCLD) disabled. Since disabling this
signal will interfere with proper determination of exit status of child
processes, Perl has reset the signal to its default value. This
situation typically indicates that the parent program under which Perl
may be running (e.g. cron) is being very careless.
- Can't "last" outside a loop block
-
(F) A "last" statement was executed to break out of the current block,
except that there's this itty bitty problem called there isn't a current
block. Note that an "if" or "else" block doesn't count as a "loopish"
block, as doesn't a block given to sort(), map() or grep(). You can
usually double the curlies to get the same effect though, because the
inner curlies will be considered a block that loops once. See
last in the perlfunc manpage.
- Can't load '%s' for module %s
-
(F) The module you tried to load failed to load a dynamic extension. This
may either mean that you upgraded your version of perl to one that is
incompatible with your old dynamic extensions (which is known to happen
between major versions of perl), or (more likely) that your dynamic
extension was built against an older version of the library that is
installed on your system. You may need to rebuild your old dynamic
extensions.
- Can't localize lexical variable %s
-
(F) You used local on a variable name that was previously declared as a
lexical variable using "my". This is not allowed. If you want to
localize a package variable of the same name, qualify it with the
package name.
- Can't localize pseudo-hash element
-
(F) You said something like local $ar->{'key'}, where $ar is a
reference to a pseudo-hash. That hasn't been implemented yet, but you
can get a similar effect by localizing the corresponding array element
directly -- local $ar->[$ar->[0]{'key'}].
- Can't localize through a reference
-
(F) You said something like local $$ref, which Perl can't currently
handle, because when it goes to restore the old value of whatever $ref
pointed to after the scope of the local() is finished, it can't be sure
that $ref will still be a reference.
- Can't locate %s
-
(F) You said to do (or require, or use) a file that couldn't be
found. Perl looks for the file in all the locations mentioned in @INC,
unless the file name included the full path to the file. Perhaps you
need to set the PERL5LIB or PERL5OPT environment variable to say where
the extra library is, or maybe the script needs to add the library name
to @INC. Or maybe you just misspelled the name of the file. See
require in the perlfunc manpage and the lib manpage.
- Can't locate auto/%s.al in @INC
-
(F) A function (or method) was called in a package which allows
autoload, but there is no function to autoload. Most probable causes
are a misprint in a function/method name or a failure to AutoSplit
the file, say, by doing make install.
- Can't locate loadable object for module %s in @INC
-
(F) The module you loaded is trying to load an external library, like
for example, foo.so or bar.dll, but the the DynaLoader manpage module was
unable to locate this library. See the DynaLoader manpage.
- Can't locate object method "%s" via package "%s"
-
(F) You called a method correctly, and it correctly indicated a package
functioning as a class, but that package doesn't define that particular
method, nor does any of its base classes. See the perlobj manpage.
- Can't locate package %s for @%s::ISA
-
(W syntax) The @ISA array contained the name of another package that
doesn't seem to exist.
- Can't locate PerlIO%s
-
(F) You tried to use in open() a PerlIO layer that does not exist,
e.g. open(FH, ">:nosuchlayer", "somefile").
- Can't make list assignment to \%ENV on this system
-
(F) List assignment to %ENV is not supported on some systems, notably
VMS.
- Can't modify %s in %s
-
(F) You aren't allowed to assign to the item indicated, or otherwise try
to change it, such as with an auto-increment.
- Can't modify nonexistent substring
-
(P) The internal routine that does assignment to a substr() was handed
a NULL.
- Can't modify non-lvalue subroutine call
-
(F) Subroutines meant to be used in lvalue context should be declared as
such, see Lvalue subroutines in the perlsub manpage.
- Can't msgrcv to read-only var
-
(F) The target of a msgrcv must be modifiable to be used as a receive
buffer.
- Can't "next" outside a loop block
-
(F) A "next" statement was executed to reiterate the current block, but
there isn't a current block. Note that an "if" or "else" block doesn't
count as a "loopish" block, as doesn't a block given to sort(), map() or
grep(). You can usually double the curlies to get the same effect
though, because the inner curlies will be considered a block that loops
once. See next in the perlfunc manpage.
- Can't open %s: %s
-
(S inplace) The implicit opening of a file through use of the <>
filehandle, either implicitly under the -n or -p command-line
switches, or explicitly, failed for the indicated reason. Usually this
is because you don't have read permission for a file which you named on
the command line.
- Can't open a reference
-
(W io) You tried to open a scalar reference for reading or writing,
using the 3-arg open() syntax :
-
open FH, '>', $ref;
-
but your version of perl is compiled without perlio, and this form of
open is not supported.
- Can't open bidirectional pipe
-
(W pipe) You tried to say open(CMD, "|cmd|"), which is not supported.
You can try any of several modules in the Perl library to do this, such
as IPC::Open2. Alternately, direct the pipe's output to a file using
">", and then read it in under a different file handle.
- Can't open error file %s as stderr
-
(F) An error peculiar to VMS. Perl does its own command line
redirection, and couldn't open the file specified after '2>' or '2>>' on
the command line for writing.
- Can't open input file %s as stdin
-
(F) An error peculiar to VMS. Perl does its own command line
redirection, and couldn't open the file specified after '<' on the
command line for reading.
- Can't open output file %s as stdout
-
(F) An error peculiar to VMS. Perl does its own command line
redirection, and couldn't open the file specified after '>' or '>>' on
the command line for writing.
- Can't open output pipe (name: %s)
-
(P) An error peculiar to VMS. Perl does its own command line
redirection, and couldn't open the pipe into which to send data destined
for stdout.
- Can't open perl script%s
-
(F) The script you specified can't be opened for the indicated reason.
-
If you're debugging a script that uses #!, and normally relies on the
shell's $PATH search, the -S option causes perl to do that search, so
you don't have to type the path or `which $scriptname`.
- Can't read CRTL environ
-
(S) A warning peculiar to VMS. Perl tried to read an element of %ENV
from the CRTL's internal environment array and discovered the array was
missing. You need to figure out where your CRTL misplaced its environ
or define PERL_ENV_TABLES (see the perlvms manpage) so that environ is not
searched.
- Can't "redo" outside a loop block
-
(F) A "redo" statement was executed to restart the current block, but
there isn't a current block. Note that an "if" or "else" block doesn't
count as a "loopish" block, as doesn't a block given to sort(), map()
or grep(). You can usually double the curlies to get the same effect
though, because the inner curlies will be considered a block that
loops once. See redo in the perlfunc manpage.
- Can't remove %s: %s, skipping file
-
(S inplace) You requested an inplace edit without creating a backup
file. Perl was unable to remove the original file to replace it with
the modified file. The file was left unmodified.
- Can't rename %s to %s: %s, skipping file
-
(S inplace) The rename done by the -i switch failed for some reason,
probably because you don't have write permission to the directory.
- Can't reopen input pipe (name: %s) in binary mode
-
(P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried
to reopen it to accept binary data. Alas, it failed.
- Can't resolve method `%s' overloading `%s' in package `%s'
-
(F|P) Error resolving overloading specified by a method name (as opposed
to a subroutine reference): no such method callable via the package. If
method name is ???, this is an internal error.
- Can't reswap uid and euid
-
(P) The setreuid() call failed for some reason in the setuid emulator of
suidperl.
- Can't return %s from lvalue subroutine
-
(F) Perl detected an attempt to return illegal lvalues (such as
temporary or readonly values) from a subroutine used as an lvalue. This
is not allowed.
- Can't return outside a subroutine
-
(F) The return statement was executed in mainline code, that is, where
there was no subroutine call to return out of. See the perlsub manpage.
- Can't return %s to lvalue scalar context
-
(F) You tried to return a complete array or hash from an lvalue subroutine,
but you called the subroutine in a way that made Perl think you meant
to return only one value. You probably meant to write parentheses around
the call to the subroutine, which tell Perl that the call should be in
list context.
- Can't stat script "%s"
-
(P) For some reason you can't fstat() the script even though you have it
open already. Bizarre.
- Can't swap uid and euid
-
(P) The setreuid() call failed for some reason in the setuid emulator of
suidperl.
- Can't take log of %g
-
(F) For ordinary real numbers, you can't take the logarithm of a
negative number or zero. There's a Math::Complex package that comes
standard with Perl, though, if you really want to do that for the
negative numbers.
- Can't take sqrt of %g
-
(F) For ordinary real numbers, you can't take the square root of a
negative number. There's a Math::Complex package that comes standard
with Perl, though, if you really want to do that.
- Can't undef active subroutine
-
(F) You can't undefine a routine that's currently running. You can,
however, redefine it while it's running, and you can even undef the
redefined subroutine while the old routine is running. Go figure.
- Can't unshift
-
(F) You tried to unshift an "unreal" array that can't be unshifted, such
as the main Perl stack.
- Can't upgrade %s (%d) to %d
-
(P) The internal sv_upgrade routine adds "members" to an SV, making it
into a more specialized kind of SV. The top several SV types are so
specialized, however, that they cannot be interconverted. This message
indicates that such a conversion was attempted.
- Can't use anonymous symbol table for method lookup
-
(F) The internal routine that does method lookup was handed a symbol
table that doesn't have a name. Symbol tables can become anonymous
for example by undefining stashes: undef %Some::Package::.
- Can't use an undefined value as %s reference
-
(F) A value used as either a hard reference or a symbolic reference must
be a defined value. This helps to delurk some insidious errors.
- Can't use bareword ("%s") as %s ref while "strict refs" in use
-
(F) Only hard references are allowed by "strict refs". Symbolic
references are disallowed. See the perlref manpage.
- Can't use %! because Errno.pm is not available
-
(F) The first time the %! hash is used, perl automatically loads the
Errno.pm module. The Errno module is expected to tie the %! hash to
provide symbolic names for $! errno values.
- Can't use %s for loop variable
-
(F) Only a simple scalar variable may be used as a loop variable on a
foreach.
- Can't use global %s in "my"
-
(F) You tried to declare a magical variable as a lexical variable. This
is not allowed, because the magic can be tied to only one location
(namely the global variable) and it would be incredibly confusing to
have variables in your program that looked like magical variables but
weren't.
- Can't use "my %s" in sort comparison
-
(F) The global variables $a and $b are rese
