Print DMS-documents using SAP-spool

Hello!

I'm facing the following problem:

When a production order is printed the documents linked with this production order also should get printed automatically. The documents (especially pdf) are managed by DMS.

My (not working) idea:

1. Retrieve the file content of the dms-originals with fm CV120_DOC_CHECKOUT_VIEW

2. Print to spool using class CL_RSPO_SPOOL_HANDLE

    -> write file content to spool using method WRITE_BINARY

Unfortunately this does not work (only the raw-data of the pdf is printed)! Has somebody any idea, how a file can be printed using SAP-spool?

Thanks in advance!

Greetings

Wolfgang

p.s.: I have already recogniced the thread 'Integrated output of DMS-Documents with production order papers' which is no help.