After upgrading Visual COBOL for Visual Studio R3 to the R4 release, the following error message is reported when starting Visual Studio 2010:
This error is caused when both the Visual COBOL for Visual Studio R3 and Visual COBOL for Eclipse R3 products are installed on the same computer and you upgrade the Visual Studio product to the R4 release. This leave the products in an inconsistent state as one is at release level R3 and the other is at release level R4.
Uninstall the Visual COBOL for Eclipse R3 product and install the R4 version instead. This will make the products consistent and the error will no longer appear.