I filed clients Federal personal income tax return no problem. 

For Minnesota, I run error check, save, e-file, and get an error message as:

"1040 MNI for SSN 123-45-6789 invalid ERO's/EFIN use correct EFIN."

I've double checked my ERO PIN 5-digit and EFIN 6-digit and they are in the MN Info page correctly and the E-file instructions page.

This is my first Minnesota personal tax return.  The Corporate return I did last week went well.