Hi,
The SQL0407N Error help shows the following SQL statement.
SELECT C.TABSCHEMA, C.TABNAME,
C.COLNAME
FROM SYSCAT.TABLES AS T,
SYSCAT.COLUMNS AS C
WHERE T.TBSPACEID = n1
AND T.TABLEID = n2
AND C.COLNO = n3
AND C.TABSCHEMA = T.TABSCHEMA
AND C.TABNAME = T.TABNAME
If you substitute the values for the TBSPACEID, TABLEID and COLNO shown in the error you will get the column for which a NULL is being inserted.
Then you should be able to trace back to the actual cause of the error.
Regards,
ritz