Hi,
I think there may be a defect in the FormulaEngine. The defect occurs when a custom property is assigned to a GridStyleInfo object, the CellType is set to either "FormulaCell" or some derrived type (as in example), and the FormulaCopyFlags of the cell type's engine is set to the "GridFormulaCopyFlags.ClipBoardReferencesAdjusted".
In this situation, formulas that are copied and pasted between cells are not adjusted as the should be given the value of the FormulaCopyFlags property.
Please see the attached sample project for a realistic example (we are using a cell type that is derived).
Many thanks,
Steve
FormulaEngineDefect.zip