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For about two years, I've been running a program that uses CAM::PDF to
break a PDF file into individual pages and processes each page using a
utility distrubuted with CAM::PDF, renderpdf.pl, to extract a text
image of each page and perform further processing on it. After
installing perl 5.10 and 1.52 of CAM::PDF, renderpdf.pl no longer
works. It reports no errors, but returns no text to my program.
Although I hadn't until now run renderpdf.pl directly from the command
line, since it's behavior changed when executed with qx in my program,
I've run it from the command line with the same result -- nothing
printed to SYSOUT. I've also run the debugger on renderpdf.pl, but
I've been unable to spot where anything is going wrong.

Here are a few lines from my program surrounding the execution of renderpdf.pl:

               use strict;
               use warnings;
                <snip> 

	my $pdf = CAM::PDF-> new($checks) || die "$CAM::PDF::errstr\n";
	if (!$pdf-> extractPages($pagenum))
	{die "Failed to extract page number $pagenum\n";}	
                $pdf-> preserveOrder();
	if (!$pdf-> canModify())
	{die "This PDF forbids modification\n";}

	$thisCheck=$singleCheck;
	$thisCheck=~s/pagenum/$pagenum/;
	logit("output name is $thisCheck\n",$silent);
	if (!$pdf-> cleanoutput("$thisCheck")) {
	   log_and_die("CAM PDF ERROR: $CAM::PDF::errstr\n".
	                      "cleanoutput Failed to output page $pagenum\n",-74)
	}
	
	@renderedText=qx{renderpdf.pl --verbose
--renderer=CAM::PDF::Renderer::Text "$thisCheck" 1};
	if ($? == -1)
	   { log_and_die("renderpdf.pl failed to execute: $!\n",-79); }
                elsif (($? > > 8)!=0)
                  { log_and_die("renderpdf.pl exited with value ".($?
> > 8),-78) }

I've compared the 1.52 version of renderpdf.pl to the 1.13 version and
there are no differences except the version number and an apparently
inconsequential change in an eval.

                 eval "require $opts{renderer}";  ## no critic for string eval
                 if ($EVAL_ERROR)
                 {
                    die $EVAL_ERROR;
                 }

                if (!eval "require $opts{renderer}")  ## no critic (StringyEval)
                {
                    die $EVAL_ERROR;
                }

I'm hopeful that the author will have time to take a look at this or
that someone who subscribes to the mailing list has an idea how I
might proceed to debug this.

TIA,

Phil
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