Running SFTP commands from a Dollar Universe uproc can require some analysis while it is executed therefore some extra information is required.
Running jobs using SFTP commands via CLI can be debugged using Windows OS tools that cannot be used while SFTP type Uprocs run.
Dollar Universe has tracing options available to write additional information into the universe.log and job log file that will help to determine what the appropriate solution is.
From UVC console -> Admin tab -> Nodes List
Select the node then Right click on Node Settings
Go to Logging section and modify the Main Log Level values as follows:
Those trace levels will provide more information regarding the SFTP job errors