When loading a composition, it doesn't seem to be possible programatically to discover whether or not a missing-node error has occurred.

For example, if a composition is using a virtual patch that doesn't exist on the loading machine, Quartz Composer will tell you all about it, but in an application you just get some lines in the console.

-[QCView loadCompositionFromFile:(NSString*)] doesn't provide this information (and doesn't return nil)

+[QCComposition compositionWithFile:(NSString*)] doesn't provide this information (and doesn't return nil)

I'm not sure if there are any other ways to instantiate compositions (the NSData-driven variants are identical in functionality to the above).

Anyone else experience this/know of a way to determine if a composition hasn't completely loaded?

--
[ christopher wright ]
[email protected]
http://kineme.net/

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