How to compress the file at the Workflows?

How to compress the file at the Workflows?

I'm evaluating the new OpM 9 and tried the Workflows.

Since it has the function to file check and Delete/Move/Copy/Compress option.

Delete/Move/Copy works without any problem. But when I try the compress, it does not work. I don't see the compressed file. 

Where it gets stored? Or is this malfunction? 

                  New to ADSelfService Plus?