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CGContextConcatCTM: invalid context 0x0. How to fix?
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CGContextConcatCTM: invalid context 0x0. How to fix?


  • Subject: CGContextConcatCTM: invalid context 0x0. How to fix?
  • From: "Gerriet M. Denkmann" <email@hidden>
  • Date: Thu, 19 Sep 2013 14:18:58 +0700

Using the new Xcode 5.0 with some iOS app, I get told:

CGContextConcatCTM: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context  and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

Same with CGBitmapContextCreateImage: invalid context 0x0.

But Xcode also tells me: No Results for "CGBitmapContextCreateImage" (nor for CGContextConcatCTM). The only CG... it finds is CGRect, CGFloat, CGSizeMake, etc.

So: where do I have to look to get rid of this "serious error"?

Gerriet.


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