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How do I go about finding out where in my code caused the following exception?
2012-08-15 09:24:27.414 TestProject[82870:17303] -[TestObj doIt]: unrecognized selector sent to instance 0x1106f320
Best way to do it: Add a breakpoint to capture all exceptions, that will give you the line of code where you are getting the exception. From the console, you will get the same message you are posting on your question, so, use the pointer address to print the object that is getting the exception. If the object is garbage(the debugger wont print it), that means you are overreleasing an object. If you have zombies enabled, you will find a prefix NSZombie__ on your class name. That also means overrelease. If you get a different class than the one you are expecting, you are switching the objects at some point and sending a message to the wrong object.