Infoprint Transform Manager to print a PDF file

I have a PDF file stored in the IFS.  I'd like to be able to initiate a
print from the iSeries.  I've been able to use GhostScript to do this from
a PC command line, however, I'd rather use this Infoprint Transform Manager
that we have.  So, I do something like the following program, and I release
the resulting spool to a printer with transforms enabled.  I always get a
'CPFB567 : Input image too small.'  Incidentally, I tried to print
PostScript using a similar method and got the same error a couple years ago
and gave up.  Does anyone have any insight into what I might be doing
incorrectly?


     C                   Eval      fd=$Open('/testsmall.pdf':
     C                             1)
     C
     C                   CallP     $QCMDEXC('OVRPRTF FILE(QSYSPRT) +
     C                             DEVTYPE(*USERASCII)':100)
     C                   Open      QSYSPRT
     C
     C                   DoU       len<1
     C                   Eval
len=$Read(fd:%addr(rddata):%size(rddata))
     C                   If        Len>0
     C                   Except
     C                   EndIf
     C                   EndDo
     C
     C                   Close     QSYSPRT
     C                   CallP     $QCMDEXC('DLTOVR FILE(QSYSPRT)':100)
     C
     C                   Callp     $Close(fd)
     C
     OQSysPrt   E
     O                       PrtRec               1