Just recently, I have been getting the following error message when I have done a very, very simple Copy Command. It happens with other commands as well, but was able to document this process with graphics from start to finish. I have uninstalled the program and reinstalled... nothing special other than just uninstall and reinstall. If there are other steps that need to be done that are embedded deeper in the computer. Suggestions???
Can be many things, but try disabling hardware acceleration. Or if that doesn't work try updating the graphics driver.
But like said by others Expand>> would have some direction to the error, and investigation of the logfile (aka Journal)might help, that you can find under C:\Users\%USERNAME%\AppData\Local\Autodesk\Revit\Autodesk Revit <Version>\Journals
Kunal Tuljaram Gaidhankar
