Netboot Error 31- Just Started Happening on Previoulsy Working Setup

[Otheym]

Hello- I have a Naomi 1 Netboot setup that has been working fine the last month or so. I tried it today and games load, the memory checks fine then it reboots to "Error 31 This Game is not acceptable by main board"

I have been using the Python Script so there is no Zero Pic.

I have tried checking everything I can think of:
The Netdimm and Naomi pass their memory tests.
The Naomi boots carts fine.
Voltages are good (using Sun PSU).
Took apart the Netdimm and reseated everything and checked the PCB over.
Tried another Naomi MB.
Tried another I/O Board.

Any suggestions?
Thanks.

 

[Mitsurugi-w]

Sounds like maybe the game images are corrupt.

 

[Otheym]

Mitsu- Your suggestion got me thinking, I never tried swapping the memory in all my troubleshooting. Just swapped out the memory with some I know worked before, and the games load now.

Since the Netdimm passed self test I thought the memory was good and did not consider it again.

I guess that means a Netdimm can pass a memory self test but still have bad memory?

Thanks!!!