Unable to cast COM object of type 'CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass'

Question

I have 2 windows program.

Program A : create with visual studio 2015 with crystal report SP18

Program B : create with visual studio 2017 with crystal report

Answer 1

Just remove old reference of crystal reports and add new assemblies. this is due to crystal report version difference old compilation working with old versions.

Simply add new reference assembly of current version and clean solution and rebuild the project and run.

It works.