Hi, I'm using 4.1.5 right now, creating my first game after I got Quest a few days ago.
Everything was working pretty smoothly, a glitch or two that were easily worked around-

But then, suddenly after removing a verb, whenever I try to add another verb to any object, an Internal Error occurs, saying,

"Error 457- This key is already associated with an element of this collection.
inQDKObjectSetup.butVerb_Click"

Does anyone know why this is happening/how I can fix it?

Cheers

(PS- I have 20 objects scattered in 3 rooms. It was when I was editing the 17th that the problem came up.)

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Here it is...