Read Attachment in a Mapping for Extdend Receiver Determination

Hello Experts,

I create a java mapping vor the extended receiver determination PI 7.11

The scenrio is (Mail with attachments -> SFTP)

Is it possible to read the Attachment Content in the Mapping for the RD ?

I get a NullPointerException in the Monitoring if i want to read the attachment.

Why is inputAttachments.areAttachmentsAvailable() = false in the Mappinng ?

Thx for the answers.