A: This indicates a missing Microsoft Visual C++ Redistributable. Download and install "VC_redist.x64.exe" from Microsoft to fix both. Final Verdict The "AutoCAD Fatal Error: Unhandled Delayload pm16.dll" is intimidating, but it is rarely a hardware failure. In 90% of support cases, the cause is a corrupted .NET Framework installation or a damaged AutoCAD user profile (Method 1 & 2).

If you are still crashing after 15 minutes, run the Graphics Driver Clean Install (Method 3).

This article explains why the pm16.dll error occurs and provides to fix it permanently, whether you are on Windows 10 or Windows 11. What is "pm16.dll"? (And Why is it Crashing?) To fix the error, you must understand the culprit. pm16.dll is not a core AutoCAD file. Instead, it is a Portable Document Format (PDF) import/export library used by AutoCAD to handle PDF underlays, PDF import, and vectorization.

Experiencing a sudden crash? Here is the definitive guide to resolving the pm16.dll fatal error in AutoCAD 2020–2025.

A: Yes, but it is overkill. A clean Windows install will fix it 100% of the time. However, try Methods 1-6 first; they resolve the issue in 95% of cases.

If you found this guide helpful, share it with your CAD network. The pm16.dll error has plagued forums for years—but now you have the definitive fix.

Nothing disrupts a workflow quite like a fatal error. You are in the middle of a complex 2D drafting session or a 3D render, and suddenly, the screen freezes. A grey dialog box appears with the dreaded message:

A: Yes. AutoCAD LT also uses pm16.dll for the same PDF functionality. The fixes are identical.