Поставил T4 из "T4 Toolbox 9.5.20.1.msi", создаю тестовый пример по мотивам http://www.olegsych.com/2008/09/t4-tutorial-creatating-your-first-code-generator/. Получаю

Error    1    There was an error loading the include file 'T4Toolbox.tt'. The transformation will not be run. The following Exception was thrown:
System.UriFormatException: Invalid URI: The format of the URI could not be determined.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at System.Uri..ctor(String uriString)
   at Microsoft.VisualStudio.TextTemplating.VSHost.TextTemplatingService.LoadIncludeText(String requestFileName, String& content, String& location)
   at Microsoft.VisualStudio.TextTemplating.Engine.ProcessIncludeDirective(Directive directive, ITextTemplatingEngineHost host)    E:\Temp2\____________temp\ClassLibrary3\File1.tt    3    4

Что ему надо? мат поскипан