Hello again Ross,
I am not sure what could be causing the problem with the attached project and at least on my side it is working as expected. The ViewHtml method was added to the EditorToolFactory for the Q3 2013 release so this error should no be thrown for any subsequent versions. Were there any changes required in order to run the project on your side? Also, are there any other methods/ helpers with which you are experiencing such problems?
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