Sorry, still not working. I replaced the comma by pipe {STRING(Right|{TASK(<task-id>|StdOut)}|10)} and got the same error message. I also tried to use only comma instead of the pipe, but same result. Anyway it was working in version 7.0.6
I think it has something to do with the Output of StdOut, if I try a StdOut with another task it is working.
The Ouput of StdOut are two "write-output" cmdlets from a powershell script.
This is the output: "No argument passed, export of default attributes! 2014-03-10"
First write-output: "No argument passed, export of default user attributes!" and
second write-output: "2014-03-10" from the powershell script.