Just a quick check, do you have the most recent version installed, and what are the fields that you are using in FF Matrix?

Hey Nicolas- sorry for the slow reply- you got back to me so fast, I missed it.  The FF matrix has two fields,  one a text input and the other an ngen file field.  The file field is currently empty on every entry.

Alright, I’ll try to reply more slowly then
I’ll have to look into this in more detail later.
How about when you add a file to the nGen field? Does the error go away?