User '%1' is not a user group

Error constant SQLE_NOT_A_GROUP
ODBC 2 State 42000
ODBC 3 State 42000
Parameter 1 Name of user you thought was a group.
Severity 16
SQLCODE –123
SQLSTATE 42W03
Sybase error code 13626
Probable cause

You attempted to add a member to group, but the user ID specified as a group has not been granted GROUP permission.