Hi,
In Aspose.Cells for .NET 26.4.0, Workbook.Save(path, new XlsbSaveOptions()) writes a 6-byte stub for xl/calcChain.bin regardless of how many formula cells the workbook contains. The same workbook Saved as XLSX via n…...XLSB save emits empty 6-byte calcChain.bin stub — Excel rebuilds...Cells for .NET 26.4.0, Workbook.Save(path, new XlsbSaveOptions())...