Email Endpoint - Output parameters

Hi,

I've a problem with the configuration of the outputs parameters of my email endpoint.

To begin, here's a short description of what I'm trying to do:

1. A user send an email (without attachment) with an order number in the subject to the system.

2. The system generates a PDF based on the order number sent by the user.

3. The system send a response email with the generated PDF in the attachments.

Everything is working very well for the points 1 and 2, my PDF is generated, I've used the variable logger to check those points.

Correct me if I'm wrong but I think that the email endpoint wait for a response at the end of the process and send the result to the user.

I've created a Document variable with the OUT option checked. My generated PDF is loaded into this variable.

But here's my problem: Whatever params I put in the email endpoint output parameters settings an error is sent to my email:

"No results after invocation. It could be a problem during invocation."

I've tried to use a binary variable instead of the Document one and the result is slightly different:

The email doesn't contain an error but there isn't any attachment.

Here's some parameters I've tried for the output mapping params:

test.pdf
Result/%F.pdf

Thanks in advance for your help.