EXC_BAD_ACCESS signal received

Question

When deploying the application to the device, the program will quit after a few cycles with the following error:

Program received signal: \"EXC_BAD_ACCESS\".         


        

Answer 1

I've been debuging, and refactoring code to solve this error for the last four hours. A post above led me to see the problem:

Property before: startPoint = [[DataPoint alloc] init] ; startPoint= [DataPointList objectAtIndex: 0];
. . . x = startPoint.x - 10; // EXC_BAD_ACCESS

Property after: startPoint = [[DataPoint alloc] init] ; startPoint = [[DataPointList objectAtIndex: 0] retain];

Goodbye EXC_BAD_ACCESS