Super Fund Details for "Employee Name" are invalid

Hi

I had a new employee start in the middle of June and I paid him to the end of 30-Jun for his first month.

I did not process his payroll until the 4th of July. I also paid his SG on the 4th July. All went through fine.

Now he is in the normal cycle with the other employees, however when I go to pay his SG it says Super Fund Details for "Employee Name" are invalid. I ran the Payroll Activity Report (Detailed) and I see that his July SG is the sum of the 4th July SG payment and the current 15-July pay run. Obviously the 4th July payments are done, and all that is left when I "Pay Super" is the 15-July balance, but i'm wondering if it won't let me pay this super because it does not match the Activity Report?

What other reason could there be for it being invalid? It went through earlier in the month and I have not changed any of his super fund details.

Thanks

Anthony