Hello, I’d like to report a bug we’re seeing when attempting to save a workbook to disk using Aspose.Cells for .NET.
If a workbook is opened and then cloned in memory using
Workbook.Copy(), saving the cloned workbook object to disk with
Workbook.Save() will not work; the call will freeze and block forever, leaving a corrupt file on disk. This only occurs with some workbooks, and the bug seems to have been introduced in Aspose.Cells 21.1.0.
Workbook: AZZ AZZ US.zip (535.8 KB)
I can reliably reproduce the issue on Aspose.Cells 21.4.0 with this code:
// Load workbook and save a copy to disk, this succeeds var wb = new Aspose.Cells.Workbook(@"C:\scratch\AZZ AZZ US.xlsx"); wb.Save(@"C:\scratch\output1.xlsx", Aspose.Cells.SaveFormat.Auto); // Clone the original workbook in memory var clonedWb = new Aspose.Cells.Workbook(); clonedWb.Copy(wb); // Attempt to save the cloned workbook to disk, this call blocks forever and leaves a corrupted workbook on disk! clonedWb.Save(@"C:\scratch\output2.xlsx", Aspose.Cells.SaveFormat.Auto);
I used .NET 5 for this reproduction but we’ve seen the issue on .NET Framework 4.8 as well. I did some testing with older versions of Aspose, and it seems like versions 20.12.0 and earlier are not affected by this bug.
Only some of our workbooks trigger this bug; I have not been able to identify a pattern.
Thank you in advance, and just let me know if you need any additional information!
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