Hi Patrick,
Thanks for contacting Syncfusion support.
We suspect the mentioned export problem might be occurred when the different build/framework version of Syncfusion ReportViewer dependent assembly referred in your application. So, we request to refer the same build and framework version assemblies in your application to avoid the mentioned problem at your end. Please find the list of Syncfusion ReportViewer dependent assemblies,
- Syncfusion.Linq.Base
- Syncfusion.Compression.Base
- Syncfusion.Presentation.Base
- Syncfusion.OfficeChart.Base
- Syncfusion.EJ.ReportViewer
- Syncfusion.Pdf.Base
- Syncfusion.XlsIO.Base
- Syncfusion.DocIO.Base
- Syncfusion.Shared.Wpf
- Syncfusion.Chart.Wpf
- Syncfusion.Gauge.Wpf
- Syncfusion.SfMaps.Wpf
Please refer to the below UG documentation link for more detail,
Regards,
Yuvaraj D.