Appium issue (KeyError: 'error' Also teardown failed: KeyError: 'error')

Hello fellows

Occasionally I have this error:

KeyError: ‘error’ Also teardown failed: KeyError: ‘error’ (Appium console)

Versions: Node v5.0.0 / Appium 1.4.13
Environment: OS x El Capitan / Simulator 8.4 (iOS)

Any Ideas ?

Thanks

Please post appium console log