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-[NSImage length]: selector not recognized

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-[NSImage length]: selector not recognized

Subject: -[NSImage length]: selector not recognized
From: Chris Outwin <email@hidden>
Date: Mon, 14 Mar 2005 10:56:41 -0600

After checking the archive, I am still puzzled by "-[NSImage length]: selector not recognized" which appears twice in the Run Log when I try to load a file into a document-based, master/detail tableview app having NSArrayController bindings.

I have dragged a NSImageCell to a tableview column where the image is supposed to appear (it doesn't on loading a file), but "length" in the error message is not something I associate with an image.

My app allows the user to add a subclass of the model object by clicking in a matrix of NSButtons. I'm using NSArrayController's addObject: to add the subclass object to a mutable array in my document subclass.

Does the addObject: method add a reference or a copy? Does addObject: need a retain? What is the best tool to determine the source of the error?

Thank you very much.

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Re: -[NSImage length]: selector not recognized
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