eteach:Did you have any luck sorting this? I am now getting this error since upgrading to version 6.
When upgrading to version 6.0, delete the old DLL and client files first then upgrade new DLL and client files.
When including the client files into VS solution, if VS prompt you to create code-behind files for aspx pages, select "NO". If you select "YES", VS will create empty code-behind files.
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