I think I fall in almost the same case as merbeth.
I´m replacing MS Office by Libre Office in an VB.Net (VS 2010) desktop application.
Running the writerdemo, I could run the application.
Now, when I replaced code calling to Writer instead of MS Word, the application the executes the word processor is not compiled. I get no error messages, but I get one warning that says "There was a mismatch between the processor architecture of the project being built "x86" and the processor architecture of the reference "cli_cppuhelper", "AMD64". This mismatch may cause runtime failures. Please consider changing the targeted processor architecture of your project through the Configuration Manager so as to align the processor architectures between your project and references, or take a dependency on references with a processor architecture that matches the targeted processor architecture of your project."
I already built as x86 and as x64, but I get no compilation of the application. To me, seems like the dll´s were built with AMD64 architeture. I tried also naming as "AMD64", but no solution.
Can you give me some help ?
Roberto Camargo / Rio de Janeiro