There are two ways to debug, using the “trace” method by logging information to our ContentDebugger (available here: http://slaw.viewpoint.com/users/cbrown/ContentDebugger_3_2_2_19.exe) using outputTrace(string), or the breakpoint method using debugBreak(). You’ll need to have a script debugger installed and registered such as .NET or MS Script Debugger… I think InterDev also works. Whatever you use to debug JavaScript should work for VETScript as well. Also you need to make sure you have the latest VMP 3.5 at http://developer.viewpoint.com and then look on the page under Vista Compatible VMP 3.5