I think it has to do with the Tk window running modal and waiting for system to return it a value. Using 1 as the first argument to system. I got it work the way you want by modifying this section like so:
#warn "path537: '$ENV{PATH}'\n";
my $prob_found;
if( $dont_use_start){
system(1, $file_to_run );
}else{
$prob_found = system ( 1, "start", "$file_to_run");
}
You will get 1 returned to your $prob_found, so you will need to change your logic for checking $prob_found to == 0
JamesNC
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