Hi, When trying to use LoadGen on a 2007 CAS with 'OWA Module' as my client type the test is failing with the error below: "LoadGenWin Error: 0 : 8/5/2011 10:56:47 AM -- System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Exchange.Swordfish.Extensions.StoreBuilder.Builder.buildFolderItems(User user, MapiStore store, NamedPropTag namedPropTag, SoftMessageCollection softMessages, Byte[] folderEntryId, MapiFolder folder, Int32 messageCount, Double unreadPercentage, Int32 minRecipients, Int32 maxRecipients, Int32 avgRecipients) at Microsoft.Exchange.Swordfish.Extensions.StoreBuilder.Builder.BuildPublicFolders(User user, PublicStoreProfile storeProfile) at Microsoft.Exchange.Swordfish.GUI.MailboxInitPage.initializePublicStore() Engine.Control Warning: 0 : 8/5/2011 10:56:50 AM -- It's possible that extended ESE Performance Counters is disabled on the server. Please refer to http://technet.microsoft.com/en-us/library/aa997018.aspx for how to enable it." This KB (http://technet.microsoft.com/en-us/library/aa997018.aspx) is for 2003 servers and apparently has no relevance on 2007 servers Thank you, Mid

Hi, Thanks for your response. The version is 14.01 and I was originally running this on the Exchange server running Windows 2008 R2. I just installed it on a Vista x64 and it is now failing during the 'Recipient Configuration Process' with the following errors. LoadGenWin Error: 0 : 08/16/2011 16:53:58 -- Unable to load default profiles:System.ArgumentException: The path is not of a legal form. at System.IO.Path.NormalizePathFast(String path, Boolean fullCheck) at System.AppDomainSetup.NormalizePath(String path, Boolean useAppBase) at Microsoft.Exchange.Swordfish.TaskEngine.LazyInitModules() at Microsoft.Exchange.Swordfish.TaskEngine.get_LoadedWellknownProfiles() at Microsoft.Exchange.Swordfish.TaskEngine.get_LoadedCustomTypes() at Microsoft.Exchange.Swordfish.GUI.WizardForm.loadProfiles() NOTE. I was not able to look into this earlier but I should now be able to spend more time with this, so I could respond to your suggestions quickly. Thank you again Mid

I am now on a Vista machine, logged on to the domain using the Domain Admin acct (which has full exchange permissions), and have also changed the hardcoded password in the LoadGenConfig.xm file to match my domain admin password. I have passed the previous error and I am now getting the following error at the 'Initialization Completed' section. Microsoft.Exchange.Swordfish.SwordfishExceptionInvalidConfiguration: Unable to start mailbox initialization because none of the user groups defined has client type that has InitializedMailbox task implemented. at Microsoft.Exchange.Swordfish.TaskEngine.CheckUserGroupsForInit() at Microsoft.Exchange.Swordfish.TaskEngine.BeginInitializeMailbox() at Microsoft.Exchange.Swordfish.GUI.MialboxInitPage.backgroundWorker_DoWork(Object sender, DoWorkEvntArgs e) Anybody has any ideas? Has anybody been able to get this tool to work? Thanks, Mid

Just 1 year passed, no answer. We need to put in production a new Exchange 2010 cluster and the stress testing is not working Engine.General Verbose: 0 : 08/22/2012 11:19:47 -- TaskEngine::initializeModules() Enter LoadGenWin Error: 0 : 08/22/2012 11:19:52 -- System.ArgumentException: The path is not of a legal form. at System.IO.Path.NormalizePathFast(String path, Boolean fullCheck) Does anybody cares to answer???