Any suggestions for the root cause of this error while running behave BDD tests

Question

While trying to run some BDD behave Tests from my local mac machine I encountered the following error. Has anyone else experienced it and any suggestions to fix it.

HOOK-ERROR in before_all: KeyError: 'SELENIUM_HUB'

Answer 1

Fixed the issue by passing the missing keys (user defined arguments in the form of -D Name=Value) at command line while running the behave tests as $ behave -D SELENIUM_HUB=local