"Internal Error" message when launching WDM for UNIFI - WKB53927

SYMPTOMS

• Launching Waters Database Manager (WDM) on UNIFI PC brings an "Internal Error" message in Internet Explorer
• Using a different browser (Chrome) brings the same error

ENVIRONMENT

• UNIFI network
• Windows Server 2012

CAUSE

The X:\Waters\Oracle\diag\rdbms\unifi\unifi\trace folder has more than 447000 files; TRC and TRM files occupy about 120 GB of space. The server hasn't  been rebooted in 19 months.

FIX or WORKAROUND

1. In the X:\Waters\Oracle\diag\rdbms\unifi\unifi\trace folder, delete all files except alert_unifi.log.
2. Reboot the server.

ADDITIONAL INFORMATION

Not sure if the server reboot is necessary.

You can try to restart the Windows service "Waters Database Manager Listener".