$0322 Error

I'm having some problems with my 1Mb PCM (12586243)

If I try to flash it with v8, I get the following error:

Attachment 17487

If flashing with v7, the error is:

Attachment 17488

Background as follows:
Vehicle is a '05 Holden Crewman.
I have successfully flashed this many times (100+) before. The last flash also seem to complete without issue. In the last calibration, I did make a change to one of the ECT parameters ({B2713} ETC Max Position for Idle) - hoping that I have not bricked the PCM....
Software details:
v8.2.2 Build 258
Bootblock 2.0.07
Firmware 2.07.63
v7.5.7 Build 261

Have tried ticking the 'assume lock is faulty' check box, but no difference in outcome.

Any insight, or additional steps to take are appreciated.

Cheers
Mark