Hi Princess,
Thanks for your reply. Firstly in regards to the date error and the final reply in the thread you linked:
'Please ignore this post. I think I found the problem. I was trying to submit a $0.00 paycheque to adjust so leave balances. I found a post on the MYOB page mentioning I had to submit as a Bonus / Commission pay run instead. It has gone through to the ATO without issue'.
This poses a problem - for recording subcontractor super through MYOB Payroll, it will always have a Nil value so I don't see how that will work. Also I have never experienced this error before when correcting leave balances etc and the pay has a Nil value so I suspect that for me this error is due to the subcontractor set up only.
I will open an online chat with your team to try to resolve the other error thanks.