Thanks Tony,

Adding key=true to the idx column has fixed the rowid issue out 🙂

However the afterInsertRow still fires for each row when the grid is sorted – is there a way to prevent that? It's not urgent as I can just test within that function whether the rowid is >= to the length of the array I'm filling the grid from – if it is then it's a new row … if not then it's already there – but it would be nice if that it didn't fire at all on sorting. I suspect there must be a good reason for this happening though so testing is probably the route I should take.

Thanks again

Romyn