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Error (1000) creating CGSWindow



Hi everyone,
I have a fairly complex Cocoa app with lots of UI elements on the screen at once, most of them custom subclasses. When I let it run for a while, I get the exception


		Error (1000) creating CGSWindow

All rendering/execution halts after this exception occurs, since its happening in the runloop. It seems to happen when I update UI elements either in a timer, or when a value changes, detected by key value observing. Does anyone have any idea what generally causes this error, or any ideas on how to prevent this? Thanks.
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