Issue:
AutoCAD 2026: When launching message “ Catalog file ‘Support\AcFields.fdc’ is not found/”.
Causes:
‘AcFields.fdc’ is missing or corrupt
Solution:
You can correct this by
- Copying the file from another system that does not have the error.
You can find this location in
C:\Users\<User Name>\AppData\Roaming\Autodesk\AutoCAD 2026\R25.1\enu\Support
Replace the file with a file from a working system to the same location on the affected system. - Copy the file from Autodesk DataCach folder
C:\Program Files\Autodesk\AutoCAD 2026\UserDataCache\Support
To
C:\Users\<User Name>\AppData\Roaming\Autodesk\AutoCAD 2026\R25.1\enu\Support - If neither of the options work, you may need to reinstall the software.
Clean uninstall of AutoCAD or verticals
https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Clean-uninstall-of-AutoCAD-or-verticals.html
About the Author
Follow on Linkedin More Content by Jeff Arbogast
