db2 failure - how to understand

We sometimes get rather cryptic DB2 errors like this

 table is TABLEID=1583 and which columns is COLNO=3?

TO understand them use this SQL

SELECT C.TABSCHEMA, C.TABNAME,
C.COLNAME
FROM SYSCAT.TABLES AS T,
SYSCAT.COLUMNS AS C
WHERE T.TBSPACEID = 2
AND T.TABLEID = 1583
AND C.COLNO = 3
AND C.TABSCHEMA = T.TABSCHEMA
AND C.TABNAME = T.TABNAME