Today, in the Autodesk discussion groups, I answered a question that I’ve been asked seemingly hundreds of times. It’s not really a Civil 3D problem, because it can happen in any AutoCAD-based problem.
Ever start a command and expect to see a dialog box asking you for options, but instead see the command options on the command line? For example, ever click on the “Open Drawing” button only to have the program ask you at the command line what file to open? That’s a little scary, especially if it’s never happened to you before. But, it’s easy to fix. Before I tell you what the fix is, let me say that no, I don’t know what causes this to happen. This is yet another AutoCAD gremlin that only shows up from time to time. I actually made it happen consistently in Civil 3D the other day.
To fix it, there are two system variables that you need to check. To check the system variables, simply type them at the command prompt. The value that they are set to will pop up beside their name in brackets. The first one is FILEDIA and the second is CMDDIA.
Hopefully, this tip will help you avoid panic next time you lose your command dialog boxes.