I would use a different approach, using a load cursor after you have created the new table with the same structure as the old one.
If DocId is an identity column you shouldn't include it in your declaration.
//LDAD01 EXEC LOADPROC,PARM='DB2X,LOADCLOB'
//STEPLIB DD DSN=DSN710.SDSNLOAD,DISP=SHR
//SYSPUNCH DD DUMMY
//SORTWK01 DD DSN=&&SRTWK01,UNIT=3390
//SORTWK02 DD DSN=&&SRTWK02,UNIT=3390
//SORTWK03 DD DSN=&&SRTWK03,UNIT=3390
//SORTWK04 DD DSN=&&SRTWK04,UNIT=3390
//SYSIN DD *
EXEC SQL
DECLARE C1 CURSOR FOR SELECT
DOC_ID,
FORMAT,
IMAGE
FROM ##T.NORMEN00
ENDEXEC
LOAD DATA INCURSOR(C1) REPLACE LOG NO NOCOPYPEND
INTO TABLE ##T.NEWTABLE