Error decrypting pgp encrypted attachments

[Richard Greasley]

Hello,

I have an error when trying to decrypt an attachment sent using PGP.
I would download the email, select Open to decrypt attachment.pgp and when I do it goes to a File En-/Decryption screen.
On this screen, I see an error message "Error decrypting file: unknown object in stream: 41"

Any idea what this means and how it can be resolved?

Regards,
Richard.