Element "call" not found in the log file

Using latest beta 5.0.8 .NET Assembly in SSIS.

I followed all the steps in the SSIS guide (which was great by the way).

Customer is requesting I wait 5 seconds before renaming file so I can't use TransferResume option. So I'm trying to use the ExecuteCommand method to rename a file after it has uploaded. I would use the MoveFile method, but it's not available yet. When I use the ExecuteCommand method I get the error: Element "call" not found in the log file.

Any ideas?

There was probably an error opening the secondary shell session to execute the command.
Please check the log files.

Due to this bug, you didn't receive meaningful error message:
https://winscp.net/tracker/871