Field '%1' of class '%2' cannot be NULL

Error constant SQLE_FIELD_CANNOT_BE_NULL
ODBC 2 state ERROR
ODBC 3 state ERROR
Parameter 1 The name of the field that cannot be NULL.
Parameter 2 The name of the class that has the field.
Severity 16
SQLCODE -649
SQLSTATE WW015
Sybase error code 13741
 Probable cause