Error creating Activity "domain index is marked LOADING/FAILED/UNUSABLE" My problem is similar to this one: Except that it happens when I try to created an Activity in the Project Navigator. If I try the steps described in the link above, it is still not working. I also tried these steps below - very similar - without success: I ran that query in Oracle SQL Developer to find the incorrect indexes and I have 3. select index_name,index_type,status,domidx_status,domidx_opstatus from user_indexes where index_type like '%DOMAIN%' and (domidx_status <> 'VALID' or domidx_opstatus <> 'VALID'); Following the two procedures above on all three incorrect indexes solved nothing. In the Search Domain page of an incorrect index, trying to drop that index displays that error: internal error code, arguments: [12806], [kkdcdtc: missing object], [], [], [], [], [], [], [], [], [], [] Failed executing statement (ORA-00600: internal error code, arguments: [12806], [kkdcdtc: missing object], [], [], [], [], [], [], [], [], [], []) After that, I am able to complete the steps in t