I have found an issue with how the Aspose Cells opens and re-saves a workbook. This is not a priority right now for me because I have fixed my source file. However, something is not processing correctly.
'USING ASPOSE CELLS 7.2.1.0
Dim WORKBOOK As New Aspose.Cells.Workbook("C:\TESTFOLDER\SOURCE.xlsx")
WORKBOOK.Save("C:\TESTFOLDER\COPY.xlsx")
The attachment has two source files and their associated copies using the latest Aspose DLLs. The original worksheet has been added to / removed from over the course of a couple of years. I boiled down the problem source to a comment in a cell. When opening the "Copy using AsposeCells BAD.xlsx" file, Excel complains "Excel found unreadable content in 'Copy using AsposeCells BAD.xlsx'. Do you want to recover the contents of this workbook? If you trust the source of this workbook, click Yes." Clicking yes returns the result of the processing "Excel was able to open the file by repairing or removing the unreadable content. Removed part: Print options". Saving the file as an XML Spreadsheet also fixes this issue.
Although my source file is working now that I'm using the Aspose Cells copy that Excel repaired, I would like to ensure any future file doesn't get broken in this manner.