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Aspose.Cells.dll error (19.9.0.0)

This line in my codeAsposeCellsDllError.pdf (117.4 KB)
causes error, please see attached screen shot:
wb.Save(saveDir + filename, SaveFormat.Xlsm);

Template used had Sheet3 and a Sheet31; changed Sheet31 to Sheet5 and error goes away.

@jone1joh,
Please share your template files and code snippet with us for our testing. We will reproduce the problem and provide our feedback after analysis. Also try latest version prior sharing the data. Aspose.Cells for .NET 20.4

Just logged this with you guys as a courtesy. I can’t take the time to do more since I was able to work around it. Sorry.

@jone1joh,
Thanks for the feedback. Feel free to contact us any time if you need further help or have some other issue or queries, we will be happy to assist you soon.