The new release of TScale which includes Application Shaping will allow you to set a threshold of CPU usage for NTVDM, and when it exceeds your threshold, stop NTVDM from using CPU at the expense of your other applications. Cheers, Bernd Harzog CEO RTO Software, Inc. bernd.harzog@xxxxxxxxxxx 678-455-5506 x701 www.rtosoft.com <http://www.rtosoft.com/> -----Original Message----- From: Petitti, Bruno [mailto:bpetitti@xxxxxx] Sent: Thursday, October 09, 2003 2:08 PM To: 'thin@xxxxxxxxxxxxx' Subject: [THIN] DOS Application We have this wonderful app (not really) that we use which is DOS based. When three users or more run this app off the Citrix box (Windows 2000 SP3, Citrix XP FR 2) the CPU stays at 100%. Does anyone know if there is a way to correct this problem? I would personelluy like to replace the app but that is not an option. Thanks for your help in advance.