>>>Sparse value ? what's means ?
>>Yourgrid.yourcolumn.sparse=.T., or was it .F.?
>
>Needs to be .F.

I always forget which value should be used when. I guess the reason for me is that I don't know what sparse really means, at least in this case. I know that in a wood trees can be sparse, as opposed to dense, but what does it mean in a grid?