Hi Renato, Welcome to Perl and to the list!
I took a quick run through your code, and it's working fine for me. Are you calling it with "perl script.pl <filename>"? The behavior you describe almost sounds like you are not providing the argument when you call the script. Hope this was helpful! Peter On Sep 25, 2013, at 12:38 PM, RENATO AUGUSTO CORREA DOS SANTOS <rcs.un...@ig.com.br<mailto:rcs.un...@ig.com.br>> wrote: Hi, all. I am a very begginer in PERL starting today in this mailing list! :-) I will try to work especially with Bioinformatics. I am trying to verify the existence of a file in PERL; however, is seems not to work. It always returns "The file $file_seqs does not exist!!!". Do you know where I am making a mistake? <code> #!/usr/bin/perl use strict; my $file_seqs; $file_seqs = $ARGV[0]; if (!-e $file_seqs) { print "The file $file_seqs does not exist!!! \n"; exit(0); } else { print "The file $file_seqs exist!!! \n"; } </code> -- Renato Augusto Corrêa dos Santos (Undergraduate Researcher) Bioethanol Science and Technology Laboratory (ABTLuS-CNPEM) +55 19 9722 5665 ________________________________ Confidentiality Notice: This e-mail may contain proprietary information some of which may be legally privileged. It is for the intended recipient(s) only. If you believe that it has been sent to you in error, please notify the sender by reply e-mail and delete the message. Any disclosure, copying, distribution or use of this information by someone other than the intended recipient(s) is prohibited and may be unlawful.
