Aspose::Cells::AbstractCalculationEngine::IsParamArrayModeRequired method. Indicates whether this engine needs the parameter to be calculated in array mode. Default value is false. If CalculationData.GetParamValueInArrayMode(int, int, int) is required when calculating custom functions and user has not updated the definition for them (by Workbook.UpdateCustomFunctionDefinition(CustomFunctionDefinition)), this property needs to be set as true in C++....will be required to cache the tree for parameters and Calculate()...