'Draw New Off-Screen Window Error 112

Hi,
I'm creating an event in the ResourceSchedVert view and I get an error 112 (Window is missing):
...thoughts, suggestions? I have edited that script. I am, however, using my own layout to work with events. This is in FMP15.
I'm creating an event in the ResourceSchedVert view and I get an error 112 (Window is missing):
...thoughts, suggestions? I have edited that script. I am, however, using my own layout to work with events. This is in FMP15.