Primary File group is full
SQL Allows you to split databases into “file groups”. This functionality is often used by high-end database system to split the database onto different drives. Cyrious Control only uses one (the default) file group.
This error message is that SQL was not able to increase the size of the primary file group and it is now full. This causes lots of problems. You may see this error directly in Control, or you may find this error in the SQL Server Event log after getting different error messages from Control.
High. User is down and can't save anything in the program.
Some options to try are as follows: