Moritz, thank you! You have saved my sanity.
Also warnings are reported for the first line in which an if starts, and warnings from subsequent conditions (sometimes?) wrongly report to be on that same line.
I was getting the exact same error, and searching fruitlessly for the answer hence landing here, and sure enough, it was a typo farther down the eslif's and not at the line in question. I thought I was going nuts there. :) (running 5.8.5 on solaris 9 if anyone cares)

In reply to Re^2: Puzzling warning "Use of unitialized value" in very simple code by gizmonic
in thread Puzzling warning "Use of unitialized value" in very simple code by jlhsgcib

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