Error in Function GroupDB Serialize2

Error in Function GroupDB::Serialize2

You have a corrupted group database file. To fix:1.   Switch to the affected server to bring up the error message and click "more." 2.   Note the group name, it ends in ".g" 3.   Under the appropriate server folder (in user application data), delete that group file while Gravity is not running. You will have to re-subscribe to that group.
This was a fairly common error in older versions but much less frequent in newer builds (2.8-2.9). But you may run into it, usually if you crash during header retrieval. The fix is to delete this group file when Gravity is not running.
 You will lose all data in that group  unless you saved a backup.
Example Fix:
Error in Function GroupDB::Serialize2
Error reading the newsgroup object from C:\PROGRAM FILES\GRAVITY\NEWSDB\NEWS.naples.com\ alt.groupname.g
Error 2 opening OLE Stream:NG
You should delete the file " alt.groupname.g " in the folder and path C:\PROGRAM FILES\GRAVITY\NEWSDB\NEWS.naples.com\