open FILE,"$commandfile";
foreach (readline FILE1) {
                            
                         if (/error occurred/) {
                                                    s/.*//;
                                         }
push @start_from, $_;
}
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FILE has many commands in it.If I see a line with comand "exit" on it-then I have to ignore the preceding line,i.e. not to put it in @start_from. Thanks

Edited by Chady -- code tags.