Two things, first @array=(@array,$number); is more efficiently written as push @array, $number;. The way you wrote it the entire contents of @array are copied each time.

Second see Carp for printing the call stack. At its simplest 

use Carp qw(carp);

carp "data $variable not valid in mySub\n";

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In reply to Re: Tracking down errors in data from input files. by hipowls
in thread Tracking down errors in data from input files. by why_bird

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