in reply to
Re^3: Error ... at (eval 75) line 7974.
in thread Error ... at (eval 75) line 7974.
Yep, you're right, t'was a bad call for which I apologise for misleading you - Carp is used in place of [perlfunc://die] i.e. when you're in control of when (and indeed where) the script dies. In your case that's completely moot since you don't know where the script is dying!!
Try use diagnostics; in your script, that should print a stack trace + a load of diagnostic (hence it's name:-) information when you hit the error.
A user level that continues to overstate my experience :-))