So, as an early Christmas present, I got myself the MODX6 - and, contrary to my love-hate relationship with MOXF6 - I love it. As MOXF is heading out to a new owner, I backed up the library and opened it in MODX - everything seemed to work fine.

I decided however, that, because I only created 6 own voices (which tells a lot about what I think about MOXF), I will copy them to user bank and get rid of the imported library forever. The good news that the ones I wanted to keep worked fine, but I have two that generate "No data" error when copying to user bank. In the imported library they sound fine. There's also nothing fancy about them either - just a three-element structure, no user arps or any fancy modulation matrix.

Is there any way I could debug this problem as of what is causing this error?