That was really the problem. Perl didnt allow me to push into an empty array so I changed the code as follows: $ids[$count-1] = trim($allcolumns[0]) but I will push whenever possible :-). Thanks for help to Funky Monk and all the others.

In reply to Re^2: Uninitialized value in string eq error but I initialized by Anonymous Monk
in thread Uninitialized value in string eq error but I initialized by karpatov

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