Column "COL" doesn't exists in table "TABL"

[Lobrys]

hi

i have a small problem :

I have 2 lists (GridDataBoundGrid): a list A with all the families, and a list B with the children of the family X

when a clic on a family on list A, the list B update and I can see the children of the family

I can add, modify and delete children....for a family

Everythings works fine, expect that :
when there are no child for the family, I can't modify the grid of the children
and when a write something in a cell, I've got an error message like this:
Column 'childName' doesn't exists in table "children"

I've got no problem when there are several child in the family

What is the problem?
is there something I must do before edit cell?

thanks a lot

Lobrys

[Lobrys]

I have forgot to say something :

when there is no child, the datatable is of course empty....but all the columns are here...

that's why I don't understand the error message

thanks for your help!

lobrys