Could you show some example code? Normally, Perl tracks the last file and line read, and will usually add that information to the warning messages:

use warnings;
while(<DATA>) { warn if /X/ }
__DATA__
foo
bar
quzX

[download]

Should generate a message like "Warning: something's wrong at - line 2, <DATA> line 3.". Might be interesting to try and find out why that's not happening in your case.

But there are ways that you can do this yourself, for example this node shows how to use a __WARN__ %SIG handler to get custom information into warning messages.

In reply to Re: Find data point generating Error in Perl code by Anonymous Monk
in thread Find data point generating Error in Perl code by kgherman

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