Hello NeXT Community: I figured out a solution to the Exception #2 error (from hell) ,
The Cube 68040 25Mhz board has new caps and a mix of new and old 9 bit parity ram with an early 2.1 rom version and 64Mb ram.
In parameters setting parity checking to yes solves it
check out the video how to
https://youtu.be/J6ljBteoVVc , this may not help in all cases but this time worked like a charm :)