SDX1200 FAQs & Troubleshooting SDX1200 Not your product? Sort by Updated Date Popularity 3 Results 1. 22.01.2020 “The entered text cannot be used.“ appears on the computer screen. 2. 22.01.2020 List of Error Messages for CanvasWorkspace (Others) 3. 11.03.2019 "Please register your machine." appears on the computer screen. Error Messages FAQs & Troubleshooting