Hello, The error you get on the machine with the .Net framework has a solution. What you need is to register your copy of Crystal Reports .Net at Crystal, this is free, they will send you an e-mail with a registration code. On your Visual Studio Project you must choose your Crystal Reports Viewer Control a write the Registration Code, then rebuild the solution and copy the application to the machine with the .Net Framework. On the Crystal Reports support site (I have no idea of the URL is ) you can find a document that explains step by step the distribution of an application that uses Crystal Reposts .Net. Hope this will be helpfull. Rui Sousa