I had the same problem, and I could not find the mentioned variable/element in any file. I followed the following steps.
Environment: Xcode 6
- Go to the Xib file, and right click (Ctrl+Mouse Click) on each UI
element to see its associations.
- In its referencing outlets section, you will be able to locate the
erroneous association.
- Remove that association
- Clean the solution and build folder
- Reset Simulator
- Rebuild and run the project.