Hi! We updated one of our websites. We cleared the cache tables of Drupal, added and deleted some modules. After that, some of our views displayed blank. I just figured out that it was because the OG nid and OG group name filed was missing on the Selection box of Views-Argument. Is there any possible way for me to retrieve this back? I've checked the module list and OG is installed. What could be the reason for this? Is there any easy way to fix this? Thanks for your help!

-mike