Error upgrading to SP26 in Visual Studio 2019

[former_member657844]

The type 'ReportDocument' exists in both 'CrystalDecisions.CrystalReports.Engine, Version=13.0.4000.0' and 'CrystalDecisions.CrystalReports.Engine, Version=13.0.2000.0' in CrystalFormViewer.cs.

In my winforms.proj file (.net v4.7.2) I see a reference to Version=13.0.4000.0 but I can't find a reference to 13.0.2000.0 anywhere in the solution. I also have a v4.7.2 class library referencing 13.0.4000.0.

I deleted the bin and obj directories in both projects and still get this error.

I cannot build and run the application. This is urgent.

[former_member657844]

I cannot find any reference to the old version in the project files. I checked this before creating the ticket. I don't know how to use Process Monitor to investigate the problem. In the interim weeks I contacted SAP many times but got no help. Last Wednesday I paid US$214 for a SAP support ticket and I'm waiting for assistance to begin.