I would need to know what version of Data Protector you are running, as well as the OS-type of your cell manager to be specific, but you will generally get teh error "another dbcheck is in progress" under these circumstances
- There is a left over 'lock' file 'dbcheck.lk'. Stop DP, find this file, delete it, as well as any other files with a 'lk' extension in the same directory, restart DP
- You have missing files in the IDB. I can't imagine how this happens, but, I have seen it before. You may need to restore the IDB from a backup, or, perhapes, start with a new IDB and restore from a backup