my $dir = "usr/bin/Test_Protokoll" #### my $dir = "usr/bin/Test_Protokoll"; #### #!/usr/bin/perl use strict; use warnings; use diagnostics; my $dir = 'usr/bin/Test_Protokoll'; my @filters = ('001', '002', '003'); foreach my $filter ( @filters ){ print "filter: $filter\n"; system("bet SYNT_MPRAGE_T1_PD_B0corr YNT_MPRAGE_T1_PD_B0corr_brain -m"); }