I save one .xls file to .xlsx using the last Aspose.Cells version and, when I open the file (using MS Excel 2013) I get this message:
"This file was created by a newer version of Microsoft Excel and a
converter is needed to open it. Do you want to download the converter
from the Microsoft Office Web site?"
You can find an example in the attachments.
Using a previous version of Cells (8.0) this message does not appear.
Thanks in advance.
Thanks for your using Aspose.Cells.
Please download and try the latest fix: Aspose.Cells for .NET v126.96.36.199 and let us know your feedback.