Common Xcode erros & their remedies

Here are a few of the errors that I've come across, their descriptions and fixes;

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -predicateFormat cannot be sent to an abstract object of class NSPredicate: Create a concrete instance!'*** 
This error comes up when you try to pass an invalid method or value the an object

Thread 1: EXC_BAD_ACCESS(code=1, address= 0xb1f034fe
This error is usually from trying to access a deallocated object

what's in a widget

This is a great widget that I would like to create.  What's it written in?

The executable was signed with invalid entitlements.

This classic error with the following text;

The entitlements specified in your application’s Code Signing Entitlements file do not match those specified in your provisioning profile.

you need to make sure they are the same.

• Goto Xcode-Window-Organizer-Devices and then goto the connected device's Provisioning Profiles tab.
• Note the name of the currently valid profile;
• In Xcode goto program-target-Project-Build Settings-Code Signing and copy the appropriate profile name into the Code Signing Identity field and also in it's children

Recompile & Off You Go!