User owns tables in use

Item Value
SQLCODE -751
Constant SQLE_USER_OWNS_TABLES_IN_USE
SQLSTATE 42W56
Sybase error code 3702
ODBC 2 State 40001
ODBC 3 State 40001

Probable cause 

You attempted to REVOKE CONNECT from a user that owns a table being used by other active users of the database.