In my multi-document application when I press the Esc key at any time, my window disappears–data and all. Gone forever.

Why does this happen?

How do I fix it?

Thanks everyone,

KentSignorini

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I believe this means that you are using an NSPanel rather than an NSWindow for your window’s class; switch it back to NSWindow and that behavior should disappear. – Bo

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Thanks, Bo. That was it.

KentSignorini