Communications Support Forums

I recently replaced a W7 head with an O5. I used the tool, programmed it with the W7 attached, powered it down, swapped the heads, then powered it up and got this error. The radio is an XTL5K with 15.XX.XX. I can still read/write to it, but I can't get any further than that. I've looked for the error, but no dice. Anyone got a clue?