DSI asked what External Class should use when using SAP Crystal Report 2020 Application. Actian said that it will need an external userclass with an ActiveX viewer component but unfortunately it wasn?t delivered with Crystal Report. Actian sent this links for some readings and help: Deprecated and Removed Featureshttps://help.sap.com/viewer/09fe9f205ee047d48d58665649fc4fae/4.3/en-US/a63659eb71074d2b8fcca84db88fe204.html , Standalone viewer application https://www.sap.com/products/crystal-reports-viewer.html