Group ownership is ignored in a filetransfer to Unix.
Unix agent ignores group ownership and reports the error:
This issue only affects the 12.1.1 Unix agent
This will be fixed in the following versions:
Automation Engine 12.2.0 - Planned release date: 2018-06-19
Automation Engine 12.1.2 - Planned release date: 2018-05-21
Use older version of Unix agent