string value always shows nil in objective C

Question

I have upgraded to Xcode 5.0. And when I run an app in debug mode and try to print an NSString value in console, it gives me the below error. Any ideas?

error: warning: couldn't get cmd pointer (substituting NULL): Couldn't load '_cmd' because its value couldn't be evaluated Couldn't materialize struct: the variable 'stringValue' has no location, it may have been optimized out Errored out in Execute, couldn't PrepareToExecuteJITExpression 

Here is the code:

NSString *stringValue = [[self.responseArray objectAtIndex:i] valueForKey:@"merchant_name"];  

Answer 1

The reason is stated in the error message: it may have been optimized out.. this means that you are compiling and running your code in an optimized manner.

you gotta change your compiler optimization level from Fastest,Smallest to none:

• go to your target build settings
• search for optimization level
• change it to none (whatever mode you are in ie debugging, distribution or release)
• profit

do the same for your project settings

Answer 2

Make sure you are in debug mode. Go Edit Scheme > Build Configuration > Debug