[Openmcl-devel] Does anybody know why (make-instance 'ns:ns-window) no longer works

Richard Sutton rsutton at ualberta.ca
Wed Jul 7 14:03:21 PDT 2021

Hello Fellow CCLers, 

I have been away for a couple years, and now I found my Cocoa code no longer works. I traced it down to one of the Cocoa primitives I was relying on: ns:ns-window. In particular, I used to be able to just make an instance of this, but now i get:

? (make-instance 'ns:ns-window)
> Error: Objective-C runtime exception: 
>        NSWindow drag regions should only be invalidated on the Main Thread!
> While executing: #<Anonymous Function #x3000011BD76F>, in process Listener(4).
> Type cmd-. to abort, cmd-\ for a list of available restarts.
> Type :? for other options.
1 > 

Does anybody know what has happened or, more importantly, how to work around this problem?

Thanks for any leads, 

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