In visio, we have excel as embedded object. We need to open and save the excel programmatically - using aspose.diagram. We need to modify in OLE object.
It seems you did not share embedded XLSX file along with the Visio Diagram which you have shared. While testing the scenario we received following exception.
We have tested the scenario in our environment and were able to notice that Worksheet data was not visible in output Diagram file. We also tried to save the Worksheet at physical location and found them fine. For detailed investigation, we have logged an issue as DIAGRAMNET-51602 in our issue tracking system. We will further look into details of the issue and keep you posted with the status of its correction. Please be patient and spare us little time.
We would like to inform you that your issue has been resolved and its fix will be available in upcoming revision of the API i.e. Aspose.Diagram for .NET 19.4. As soon as new version of the API is available, we will inform you.