This article is no longer maintained in Citrix as its content refers to a discontinued/EOL product.
After successfully completing discovery, the Citrix Access Management Console in Presentation server 4.5 shows the following error message when trying to display the Users or Sessions connected to a server:
“An error occurred. Try performing the task again. If the problem persists, contact support”
One or more sessions have become corrupted. To verify this, start the Terminal Services Manager console and check is there the user session showing an excessively long idle time for example: 50 days when the server is rebooted monthly.
To resolve this all users must log off and the server restarted. After reboot, recreate the Local Host Cache.