: If the file is missing or corrupt, running a "Repair" on the AutoCAD installation via the Windows Control Panel is often the quickest fix. Technical File Details Extension : .hdi (Heidi Device Interface). Developer : Autodesk, Inc.
: You are trying to run a 16-bit or early 32-bit application on a 64-bit version of Windows 10 or 11. autocad virtual device gdi16.hdi
In AutoCAD, is a "Heidi" graphics driver file that represents the Software Graphics virtual device : If the file is missing or corrupt,
When you see this error, AutoCAD is essentially saying, "I'm trying to talk to your screen, but the language I'm using is so old that your modern computer doesn't understand it." The Conflict The error usually triggers because: : You are trying to run a 16-bit
// Clean up SelectObject(hdc, hOldPen); DeleteObject(hPen);
: Ensure your card is recognized by visiting Autodesk Support .