The error "@commands and other UI functions are not allowed in this context" can be cuased by trying to use foreground UI calls in the background.

One other slip which you may get the hang of is if you program a Hotspot when you haven't defined a hotspot.

ie you have just underlined some text.

The code will go into the window title properties box instead.

This could stop a form from opening and cause stress.

Doh.