DB2 Delete with Inner Joins

Trying to delete from a table where there are matching records in other tables.

I've tried different variations of this, but this one returns:

SQL Error [42601]: [SQL0199] Keyword INNER not expected. Valid tokens: USE SKIP WAIT WITH FETCH LIMIT ORDER WHERE OFFSET.

It's basically a cross library / cross database, but can't get DB2 to play along. The Select works just fine, if I replace the delete with SELECT *

 DELETE a
  FROM INHOUSE.ANDREWCAT a
   INNER JOIN ERPLIB.SRBPRG b ON
   a.PSPRDC  = b.PGPRDC
   INNER JOIN ERPLIB.SRBRSD  c 
   ON 
    b.PGIRGP = c.RDSRTY 
   AND c.RDTOFI = a.EPNUM AND c.RDSRTY = c.RDWHAT 
   AND a.EPNUM = 'REM104'

DB2 does not support the syntax you ware using.

Instead:

DELETE INHOUSE.ANDREWCAT a
WHERE EXISTS (SELECT 1
              FROM ERPLIB.SRBPRG b JOIN
                   ERPLIB.SRBRSD  c 
                   ON b.PGIRGP = c.RDSRTY
              WHERE a.PSPRDC  = b.PGPRDC AND
                    c.RDTOFI = a.EPNUM AND
                    c.RDSRTY = c.RDWHAT AND
                    a.EPNUM = 'REM104'
             );