So updating firmware fixed the issue.
I’m not sure why but some middle firmware versions weren’t working. The 790s with A11 worked fine, but A18 produced the error, and then when they updated to A21 it worked.
We can mark this as solved. I appreciate everyone helping.
Oh I know you were. I didn’t mean it as a slight, if it came off that way I apologize.
No most 790/9010/9020 work absolutely fine. It is just these 4 particular machines as far as I know. My techs are going building by building. I was in the process of collecting the latest firmware for each model for them to test and get back with me.