Hey @gualter , the filed “Attachment Field Name” expects only one binary. You cannot use more than one (comma separated list). Besides you just need the name, do not use the expression.
I’m not familiar with the course itself. However, I can see three options:
- You zip all the binaries into a single binary archive file
- You do not agregate them, use sperate items. In this case, however, you will send as many emails as there are binaries
- If the number of binaries is predefined, you can use the required number of “Attachment Field Name” fields - one for each binary.