-503 A COLUMN CANNOT BE UPDATED BECAUSE IT IS NOT IDENTIFIED IN THE UPDATE CLAUSE OF THE SELECT STATEMENT OF THE CURSOR

Explanation
 The application program attempted to update (using
a cursor) a value in a column of the object table that was not identified
in the FOR UPDATE clause in the cursor declaration.
 Any column
that is to be updated must be identified in the FOR UPDATE clause
of the cursor declaration.

System action
 The statement cannot be processed. No
data was updated in the object table.

Programmer response
 Correct the application program. If the
column is to be updated, its name must be added to the FOR UPDATE
clause of the cursor declaration.

SQLSTATE
 42912 