More information about the AUC file

What does AUC stand for?

AUC is short for Application Unicode Cache.


What is the AUC file used for?

The file contains a cache. Objects of the application object tree from Ax are stored locally, so that they don't have to be read from the AOS server over and over again.
So it should speed things up a bit.


Where can you find the AUC file?

This cache file is stored together with the user profile information. And as so it's location varies according to the operating system version used.

You can find it in following folder:
Windows XP and Windows 2003
C:\Documents and Settings\%username%\Local Settings\Application Data

Windows Vista, Windows 7 and Windows 2008
C:\Users\%username%\AppData\Local


Can you delete the AUC file?

Barack Obama and I agree: Yes you can!
Close your Ax client session, delete the AUC file. The AUC file gets recreated automatically next time you logon to Ax.


How is the naming of the AUC file defined?

In older Ax versions (3 and 4), the filename for the cache file is based on the AOS name, server name etc. In Ax 2009, the name is based on a GUID. The GUID used is the one you can find in the Ax table SysSqmSettings (field GlobalGuid).
As such, watch out with duplicating databases for test purposes. You don't want 2 Ax server instances using the same GUID and as such the same cache file, as this will lead to unexpected results. (Should this happen: Replace the GUID in table SysSqmSettings with an empty one. A new GUID will be created by the AOS at restart.)