Contents Index Field '%1' of class '%2' cannot be null Foreign key '%1' for table '%2' duplicates an existing foreign key

ASA Error Messages
  Database Error Messages
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FOR UPDATE has been incorrectly specified for a READ ONLY cursor.

Item Value
SQLCODE -813
Constant SQLE_NON_UPDATEABLE_CURSOR
SQLSTATE 42W36
Sybase error code 7301
ODBC 2 State 42000
ODBC 3 State 42000
Probable cause 

You attempted to declare a cursor FOR UPDATE on a query that is not updatable. Queries that contain DISTINCT, GROUP BY, HAVING, INTERSECT, EXCEPT or UNION, or that contain aggregate functions are read only. If the ANSI_UPDATE_CONSTRAINTS option is on, then queries that contain an join are read only. If the query references a view then the view may be non-updatable.

Contents Index Field '%1' of class '%2' cannot be null Foreign key '%1' for table '%2' duplicates an existing foreign key