In my testing, $csv->eof did not return true even after trying a second get_line (According to the documentation is does not return true until after an attempt to read past the EOF.)

In any event the cause was a change in global state in open_po: $/ was being set to undef. See Re: Cannot work on second file after reading first file.

In reply to Re^6: Cannot work on second file after reading first file. by sn1987a
in thread Cannot work on second file after reading first file. by 1straw

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