I have a ultrawingrid bound to bindinglist. Apart from this there are number of unbound formula columns defined by the user of the app. The formulas are stored in the database and in the runtime, I add these unbound columns to the grid.

Most of the times, everything works fine. But sometimes following error is thrown. Stack trace does not give the complete information.

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

I think this message comes internally from the ultrawingrid.

 Any suggestions/guess/help.