Where can I find more help on the OpenPlcCodeViewByFCCall function?

I have done some searches but found nothing besides the basic Portal help file.   Attached is the fault I get when I try to use it. The Trace Viewer log is attached. There is no remedy for 3302 in the Portal help.   Also shown is how I configured it. I know I put the multi-instance name in for UDT path which is probably what is wrong, but I’m not sure what else to put there.   This is an important feature for our customer in order to choose WinCC Unified as it’s on a lot of their Comfort faceplates. I understand LAD in the code viewer is a new feature as of Upd1 so hopefully someone has some experience with it. Thanks.
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