Your problem is coming not from the Graph, but from a script that's running. (That's what that error message is referring to.) I suggest turning on the debugger, then logging in to see exactly what operation is throwing the error. That will tell you which privilege needs to be loosened. You'll likely have to create a new privilege set, since you can't modify the stock ones.
Another possibility: The fmapp extended privilege is not enabled, and you have the file on FileMaker Server.
That was it!
You are good Mike. Without your help my kids, kids, would have still been working on that one. This is my first time working on something this "complex". Thanks for the help.