Most of the warnings end up being wrong and it's just creating a massive log file. Anyway,I guess I have no choice because it will not run without it.

You do have a choice - either live with the massive error log and have trouble finding a real problem in among all the noise or else fix the problems in the script which produce the noisy warnings in the first place. I strongly favour the latter.

If you do not know how to avoid one particular warning, you can post it here as an SSCCE and the monks can point you in the right direction.

If your script produces warnings and you don't even understand what the warnings mean, consider using diagnostics, but only on your dev environment (otherwise your log file will only get even more massive!).

Good luck.

... all my other scripts work just fine. No line ending issues.

You need to focus your attention not on the scripts that work ok, but on the one that does not. In particular, and as suggested by Corion's post, I would look at a hex dump of the offending source file and compare it against other, well-behaved script files with an eye to line-ender infelicities.

And just to echo hippo's good advice while I'm at it, I would enable warnings (and strictures as well; see strict), although perhaps not globally but only locally, and clean up the problems exposed thereby.

Corion may be onto something here regarding line-endings. If you want to check your file's line-endings specifically, you can use the following one-liner. It'll print out in hex the line ending for every line in the file, preceeded by the line number. Redirect it to a file if the list is too long for your console.

perl -wMstrict -nE 'say "$. ".unpack("H*",$1) if /([\n\x{0B}\f\r\x{85}
+]{1,2})/' file
[download]

Output:

1 0a
2 0a
3 0a
4 0a
5 0a
6 0a
[download]

That's a Unix style ending, (\n). For a Windows ending, you'd see 0d0a for \r\n, and for Mac (or possibly a broken Windows ending), 0d for \r.

If your endings aren't all the same, you can try running dos2unix at the command line, or in a vi/vim editor: :set ff=unix, then :wq.