Cannot copy file (222) error?

Hi, is anybody familiar with the following error reporting from the SyncBackPro log: "Failed to copy from Source : Cannot copy file (222): The file type being saved or retrieved has been blocked". I am using the latest version (V.6.5.38.0). The file producing the error ends in .pl). Any idea why I am receiving this error and how I might resolve it?

Thanks!

Mark