SmartAssembly has encontered an invalid symbol

Hi, I have a problem with obfuscating a project. I use SamrtAssembly 6.9.0114. The error is the one in the image. I tried to use the MandatoryPath parameter pointing to the DLL C: \ WINDOWS \ assembly \ GAC \ Microsoft.mshtml \ 7.0.3300.0__b03f5f7f11d50a3a \ Microsoft.mshtml.dll which is what I use as a reference in my Presenter project but when I add the parameter in the .saproj file and what I see in the second image that I am attaching occurs, when I reopen the smartassembly project.



.saproj file



Failed to reopen the smartassembly project



Thanks!

Matias