It sounds like something didn't uninstall properly and somehow an older version of the COBOL CodeDOM assembly is being referenced by the Winform project. Can you please clarify what you mean by: "I did uninstall the previous version with the console uninstaller" What is a console uninstaller? Also, when you say you cannot do a Repair on the vcvs product what exactly do you mean? If you start Control Panel and select Visual COBOL for Visual Studio 2015 and then click on uninstall/Change you should get a repair option. Do you not get this?
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