mmusser@localhost:~/programming/perl$ perl prep_gen.pl some_file.csv Please provide the full merchant name: NOTE: migration conclude date set to 2012-08-02 00:00:00 Please provide the customer ID as it appears in the DB: Use of uninitialized value $customerId in scalar chomp at prep_gen.pl line 50, <> line 1. Use of uninitialized value $customerId in pattern match (m//) at prep_gen.pl line 52, <> line 1. Invalid input; customer ID must be completely numeric. Please try again: