Parameter is not valid

I recently upgraded from v2.6 to v3.1. When I try to open one of my existing sequence files, I get a “Parameter is not valid” error.

It’s not the end of the world: I can probably recreate a sequence if I need to. Just wondering if there was a workaround.

If you can share your sequence we can take a look and likely address it. But there is not an immediate work around.

Thank you,