CAD tip # 6686:

Question

CAD

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MSI Error 1325. [username] is not a valid short file name

AutoCAD or other Autodesk product fails on installation or on the first run with the Error 1325.

This is a MSI installer error appearing on user accounts with names containing a dot (".") or with names longer than 11 characters. Users' login names probably have a period in their usernames - i.e.: "first.last".

What to do:

Install your CAD product in the Administrator account and then copy the Registry entries (HKEY_CURRENT_USER\Software\Autodesk) and the folders c:\Users\[username]\AppData\Local\Autodesk and c:\Users\[username]\AppData\Roaming\Autodesk.

ACADInventorRevitmax

*CAD

20.5.2009 42958× Expert

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Product Design Collection

AEC Collection

applies to: AutoCAD · Inventor · Revit · 3ds Max ·

See also:
Tip 14328:	How to verify entitlement of an application from Autodesk Apps using LISP?
Tip 14323:	AutoCAD does not start, saved DWGs are sometimes corrupted, fatal error during export or copy, or missing NLS file.
Tip 13539:	Revit 2023.1 shows "Twinmotion is not installed"
Tip 13263:	Error when renaming assembly files in Design Assistant 2022.
Tip 12605:	Script error (utag) when trying to log-in with your Autodesk ID.

Selected tip: How to switch between ACAD.PAT and ACADISO.PAT?

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