I have created a zip file containing a wrl and jpg for Full Color Sandstone (see appendix) After uploading I get this message (see below) What am I doing wrong? I use SketchUp 8 pro Hi Hans, Uh oh! Seems like your model needs a bit more love before our robots can work their magic. The 3D model Untitled you recently uploaded didn't pass all our automated checks, so it's not yet ready for 3D printing. Our tutorials and FAQ can be super helpful for more detailed information, or you can always ask the community a specific question on our forum If you're stuck or have any questions, don't hesitate to reach out at firstname.lastname@example.org. Please include the file attached to the email, as well as any notes on your design, so we can help you solve your problem as quickly as possible.