VW2017 - OpenGL render not working in SL viewports which view DLVPs in Known Issues Posted October 19, 2018 Mark, I'm glad it works for you in those windows, but it does not work for me. Regardless, OpenGL should work when editing from a sheet layer. It should always work everywhere. Anything less is unacceptable. Right not, some combination of VW, my video card, or something is causing OpenGL to fail. It is NOT my individual file. It happens everywhere. It may have to do with files created in VW2016 or VW2017, but it is very, very, very, very, very common to start a job in one version of VW and finish it in another. This minimal compatibility should be top of the list for future versions, but apparently it is not. I think that is the problem and it needs to be fixed if VW is going to continue its absurd release frequency of once a year---twice what it should be, in my opinion, to ensure a stable product.