Test Studio throws an error when attempting to trigger the change event for an HTML select control. The problem is avoided if you uncheck TriggerjQueryEvent for the step. Steps to repro: run attached test *customer application - DO NOT PUBLISH please Error message: InnerException: ArtOfTest.WebAii.Exceptions.ExecuteCommandException: ExecuteCommand failed! InError set by the client. Client Error: OnSelectedInsuranceValueListChange is not defined BrowserCommand (Type:'Action',Info:'NotSet',Action:'InvokeJsFunction',Target:'ElementId (tagName: '',occurrenceIndex: '-1')',Data:'$(document.getElementsByTagName('select')[9]).change();',ClientId:'ce402ef4-64f7-4eb3-bba7-ef3a1e5c1862',HasFrames:'False',FramesInfo:'',TargetFrameIndex:'-1',InError:'True',Response:'OnSelectedInsuranceValueListChange is not defined') InnerException: none.