It is error 12 - variable not found. It doesn't happen when the form loads, but if you 'call' it from the child grid it pops up.

This.HighlightForeColor = EVALUATE(This.Columns[1].DynamicForeColor)

I have tried (from grid2)

thisform.grid1.HighlightForeColor = EVALUATE(Thisform.grid1.Columns[1].DynamicForeColor)

, but that gives the same error..