I use a lot of scheduled Powershell tasks to make my life as SysAdmin a bit easier. Recently one of the scripts returns error 0xFFFD0000 as the last result. The task used to work, so I started checking the script, run it step by step to see where the error originates. The script didn’t throw any errors, so the problem had to be in de scheduled task settings.
As it turned out, 0xFFFD0000 is not a script error, but a path error. I recently changed a folder name where the script was located. So it was a simple path error. The error code is poorly documented and seems to be a permission or path error.