I have a grid class whose member data for the columns is set to a class in a PRG file. This all works fine. However, I want to add a custom control class that has a checkbox in it to a column in the grid. I am trying to do this AFTER the INIT of the grid once all the columns have been added, etc. However, I get the following error:

Error loading file - record number 63. chkBox < or one of its members >. Parent : Cannot add an object to this class

So this means we can not add a different control to a grid column when we specify member data?