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");
    }

[download]
You will get 1 returned to your $prob_found, so you will need to change your logic for checking $prob_found to == 0
JamesNC

In reply to Re: Need mouse move??? for Tk, Windows, Excel, system, start by JamesNC
in thread Need mouse move??? for Tk, Windows, Excel, system, start by ff

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