Make sure you're actually updating ex-references by hitting the mini refresh key in the palette toolbar.
Receive Notification of Changed Xrefs
When you attach xrefs to a drawing, the program periodically checks whether the referenced files have changed since the last time the xrefs were loaded or reloaded. The XREFNOTIFY system variable controls xref notification.
By default, if a referenced file has changed, a balloon message is displayed near the Xref icon in the lower-right corner of the application window (the status bar tray). Click the link in the balloon to reload all changed xrefs.
If you close the balloon message without reloading, an exclamation point is added to the Xref icon. If you click the Xref icon, the External References palette is displayed.
By default, the program checks for changed xrefs every five minutes. You can change the number of minutes between checks by setting the XNOTIFYTIME system registry variable using (setenv "XNOTIFYTIME" " n ") where n is a number of minutes between 1 and 10080 (seven days).
Note: When changing the value of XNOTIFYTIME, you must enter the system variable with the capitalization as shown.
Update Xrefs with Demand Loading Turned On
If demand loading is turned on when you load or reload an xref
- With the XLOADCTL system variable set to 1, the referenced drawing is kept open and locked. No one else can modify the referenced drawing.
- With XLOADCTL set to 2, a temporary copy of the most recently saved version of the referenced file is opened and locked. Others can open and modify the referenced drawing.