Error while opening a PDF in SXMB_MONI which is sent as an attachment in ECC Proxy

Hi,

We have a requirement to send a PDF as an attachemnt to PI through an ECC Proxy. But we have encountered the following error in SXMB_MONI.

Error:

File doesnt not begin with '%PDF-'

The PDF Attachement is not opening in MONI.

Attached the code that we used.

Please suggest as to how to overcome the error ASAP.

Thanks,

Soundarya