Hi, JetStress will install, but will not go beyond "Checking Test System". This same behavior was observed on all installs of JetStress (08.01.0177.000) on Win 2003 SE SP2 and Win 2003 EE SP2, both operating systems are 32bit. Microsoft Exchnage Server 2007 is not installed (nor has it been installed ) on any of the machines. VERSIONS: JetStress 08.01.0177.000 OS: WIN 2003 XP 2 (plus all the Service Packs as of 02/09/2008) FROM Exchange Server 2007 CD:: ESE.DLL (12/03/2006) ESEPERF.DLL (12/03/2006) ESEPERF.HXX (11/09/2006) ESEPERF.INI (11/09/2006) OUTPUT FROM JETSTRESS: 2/10/2008 10:52:27 AM -- Microsoft Exchange Server Jetstress Core Engine (version: 08.01.0177.000) detected. 2/10/2008 10:52:27 AM -- Microsoft Windows Server 2003 R2 Service Pack 2 (5.2.3790.131072) detected. 2/10/2008 10:52:27 AM -- Microsoft Exchange Server Database Storage Engine (version: 08.00.0685.024) detected. 2/10/2008 10:52:27 AM -- Microsoft Exchange Server Database Storage Engine Performance Library (version: 08.00.0685.024) detected. 2/10/2008 10:52:28 AM -- Database or Database ==> Instances performance counter category is not registered. 2/10/2008 10:52:28 AM -- Database Storage Engine Performance Library is successfully registered. 2/10/2008 10:52:28 AM -- Database Storage Engine Performance objects and counters are successfully loaded. 2/10/2008 10:52:28 AM -- Advanced Database Storage Engine Performance counters are successfully enabled. 2/10/2008 10:52:28 AM -- This process is required to restart for the changes to take effect. The output is the same whether .NET 3.0 is on the machine or not. .NET 2.0 is installed on all machines with the .NET service packs. These are standard stand-alone installs, no roles installed on servers and they are not members of any domain. All the Microsoft updates have been installed. Also, this version of JetStress does not have a "Fix button". The only options after running the JetStress test are "Back" and "Exit". The command line version produces the identical outpt as the windows version. Thanks for any assistance, Sammeh Thanks for any insight.
