I'm a developer (.Net, Java) but I'm a new Iphone/Touch developer, I'm writing an app that currently uses a couple table view controllers, navigation controller, a sqlite3 database for storing some reference data. Up until about a day ago, my application was running great both in the simulator, and on my device,...I haven't made any major changes really, but all of the sudden, it crashes only on my device, with the following error: Program received signal: "EXC_BAD_ACCESS" It works as expected in the simulator however which is why I haven't been able to really pin it to a particular new line of code or anything. Unfortunately, it's not like it's crashing on a single line of code so I can step through the debugger and pinpoint the exact cause of failure. When it fails, I get the above error, and the debugger is breaking somewhere in the assembly/machine code. Anyways, I'd love some tips, pointers, good reference articles on this particular issue, as well as maybe general best tips for debugging applications both within the simulator and on my device. I'm not looking for anyone to solve my problems really, but just trying to learn more about XCode and the whole debugging environment...and if you have insight into this particular issue, that would be great too!