Many thanks for the clear and cogent explaination.

I don't actually do any XS, but I do use modules which do, and that would appear to be the source of the problem. I still remains somewhat mysterious that on all the occasions where this has come up, the code in question has worked fine and I have just ignored the warning.

Slightly more troubling is the I am making a gut-feel association between the appearance and disappearance of the warning, with changes to the formatting of the source code, rather than the logic. But that's only a feeling have.

I've encountered it enough time that my first instinct is to disable the warning and get on with what I am coding, rather than trying to debug the source of the problem itself.

I'll know better what to be looking for the next time it comes up. Now, armed with better info, I'll try to be more dilligent next time.

Again, my thanks for the education.

Examine what is said, not who speaks.        The end of an era!
"But you should never overestimate the ingenuity of the sceptics to come up with a counter-argument." -Myles Allen
"Think for yourself!" - Abigail        "Time is a poor substitute for thought"--theorbtwo         "Efficiency is intelligent laziness." -David Dunham
"Memory, processor, disk in that order on the hardware side. Algorithm, algorithm, algorithm on the code side." - tachyon

In reply to Re^2: Source of warning message: "Use of uninitialized value in subroutine entry" by BrowserUk
in thread Source of warning message: "Use of uninitialized value in subroutine entry" by BrowserUk

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