payment advice codepage

[radoslaw_parzentny]

Hi SAP experts,
I have set up mail sending of payment advices via BTE 2040 at a customer (ERP 6) and developed a form in Bulgarian (Cyrillic). In normal printing it works fine. But if an e-mail adress is stored in the master record of the creditor and the mail sendig is triggered, the PDF file in the attachment comes out incorrectly. All Cyrillic characters are replaced by 'X' (see picture).

I suspect a problem in the code page. However, the PDF attachments for other countries (e.g. Poland) are displayed correctly in the mails, only with Cyrillic character set there are problems.
Do any of you maybe know where I should start to analyze the problem? Where to set up something like this???

Thanks in advance for any advice.

Greetings
Rado