Start by trimming your input data in half until you find a minimal set of input that causes the issue.

Yes, that's the right method when you don't know where the issue occurs (for example if you first slurped the file into a scalar or an array, then you get the line number of the last line of the file), but in this case, I am a bit surprised that the warning does not say on which line of the input file the issue occurred. To the OP: did you give the full warning?

In reply to Re: Can you tell me why I get this error and if I can optimize my code somehow? by Laurent_R
in thread Can you tell me why I get this error and if I can optimize my code somehow? by Anonymous Monk

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