feline,
The scripting capabilities of FM are remarkable. It's possible that that you've found an instance where something is not easily done (or perhaps not possible), but I can assure you that just about anything else is possible. So, I'd hate for you to get a bad taste about FM scripting just due to this one issue.
Jang,
What client are you trying to invoke? Is it the Structure Generator on a single document? The documentation for structuring a single document has been wrong forever, so it will not work as currently advertised. If you have the right syntax, though, it works great. Here's an FDK code snippet for a document conversion that should show what you need, in case this was your issue:
F_Sprintf(tempUChar, "INPUTDOCID %d", docId);
F_ApiCallClient("Structure Generator", (StringT)tempUChar);
F_Sprintf(tempUChar, "RULEDOCID %d", convTableId);
F_ApiCallClient("Structure Generator", (StringT)tempUChar);
F_Sprintf(tempUChar, "OUTPUTDOCNAME %s", tempPath);
F_ApiCallClient("Structure Generator", (StringT)tempUChar);
F_ApiCallClient("Structure Generator", "StructureDoc");
I believe the error in the manual is that is says to call "GenerateDoc" at the end, which is wrong and does nothing.
I remember in the past working with someone trying to structure a book and I'm not sure if we ever got that working. Maybe that was you... sorry if I forgot 
Russ
Message was edited by: Russ Ward