Thanks for your response.
I have done all of the things you suggested above (although the Repair just uninstalled and reinstalled Office!), but I followed the instructions and did a manual uninstall and reinstall.
However, the problem persists!
It looks like I can no longer use array formulas in tables! The sort works once, then it's almost as if the sort corrupts the array formula and, if I try to sort again, Excel crashes. If I delete the array formulas and re-enter them, I get one good sort,
then exactly the same thing happens.
For now I will have to find a workaround but please report this back to the Excel team at Microsoft. I use tables and array formulas in lots of my solutions and I really don't want to have to rewrite everything (and in some cases this will not be feasible
without VBA and I don't really want to have to write code where a formula has and should work).
Thanks
Shirley