Could not load NIB in bundle

Question

I am trying to load a nib file from MainViewController but i get an exception which i mentioned below. I am not getting this exception regularly (1 out of fifty times). Check the exception below  
Exception :
Could not load NIB in bundle: 'NSBundle </private/var/mobile/Containers/Bundle/Application/38ABE26C-F87E-49F1-9F29-E46E 7ACDBD54/E2_IOS_App.app> (loaded)' with name 'NetWorkError'
the code i use to present this nib file is 
NetWorkError *error=[[NetWorkError alloc]initWithNibName:@"NetWorkError" bundle:nil];
                        error.errorMessage=[details serverDownMessage];   // passing some message before presenting .
                        [self presentViewController:error animated:YES completion:nil];
i am using an iPad running with iOS 7.
People with similar issues where asked to check the nib name , check if the .xib is added to target, check if the .xib is added to copy bundle resource.But every thing is correct for me. what else might be the issue ??.

Answer 1

Seems to be a bug in Xcode 6.3. I have this only happening when loading nibs on iPad. I tried unchecking 'Use Size Classes', recreating the nib and even using an empty nib. Seems Xcode 6.3 cannot instantiate ANY nib on iPad.
UINib * testNib = [UINib nibWithNibName:@"..." bundle:[NSBundle bundleWithIdentifier:@"..."]];
NSArray* testNibObjs = [testNib instantiateWithOwner:self options:nil];
The UINib object gets created. But trying to unarchive it crashes at the second line. I think there is  a workaround Apple provided, but I cannot find it. Has anyone experienced this?