>Hi all,
>I've noticed recently that my database (within the project) is read-only all the time, so I can't edit referential integrity or 'clean-up' database (option is disabled). I am not aware of any special changes that I've done to the database. There were no problems when opening and packing dbc file from command window. What should I do in my project to correct this situation?
>Thanks a lot in advance for any suggestions.

Run the command in the command window
OPEN DATABASE YOUR_DATABASE_NAME EXCL
hth :)