I am seeing some very strange behavior. In the attached workbook, cell B1726 on the Input sheet has formula =B1725. In memory in my C# program, after CalculateFormula is called for the workbook, I can see the DoubleVal…...sahi September 8, 2025, 11:54am 4 @bytefyre...one(the first option). bytefyre September 8, 2025, 7:34pm 5 amjad.sahi:...