>>Did you keep the grid's recordsource while manipulating the column? Maybe it's a little more bound to the data now; if you unbind it, would it work?
>
>No. I tried to set recordsource to empty grid as the code below, but
>C5 error occurs always.
>I have found that C5 error occurs only if grid contains a combobox.
>If grid contains only textboxes, no error will occur.

What I had in mind is to remove the recordsource before removing the columns. Also, if this doesn't work, did you have any luck with .removeobject()ing columns one by one?

* Form Change layout method
this.MousePointer = 11   &&& hourglass
_screen.mousepointer = 11
* this this is removed, grid columncount will not go to zero.
this.cmdFormSwitch1.setfocus()
crrecords = this.gridbase1.recordsource
this.gridbase1.recordsource = ''   && Dragan hint <b>here</b>
this.gridbase1.columncount = 0
this.cmdFormSwitch1.FindNextLayout(thisform.brtabel)
this.gridbase1.recordsource = crrecords
this.gridbase1.Init()
this.gridbase1.setfocus()
this.mousepointer = 0
_screen.mousepointer = 0