given that your $source_directory contains spaces, the system command is misinterpreted: 
`dir $source_directory /b/s /o:-d`;

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use system(@list) form instead: 
system('dir', $source_directory, '/b/s', '/o:-d');

[download]

In reply to Re: how to dir a directory that have space by vkon
in thread how to dir a directory that have space by AtlasFlame

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