Derek Slaughter

@Edward-Ernest Please try running the OpenFAST registry manually so you can see the error it outputs when generating `InflowWind_Types.f90`. When I do this, I get the following output: ``` -----...

To run the `openfast-registry` manually, open a command prompt and `cd` to the `vs-build` directory which contains `RunRegistry.bat`. Then run `RunRegistry.bat InflowWind` from the command prompt to generate the registry...

@bjonkman do you have any insights?

Yes, it's been resolved enough that it doesn't cause segfaults. Further exploration of the calculation of unsteady aero parameters from the polars would be good, but this shouldn't hold up...

@hkross Adding the MHK multi-rotor would be great to this PR would be good, or we can go ahead and merge this and you could add it later. Whatever works...

@luwang00 @RBergua I'm looking into the difference in linearization between Windows and Linux, could you confirm that OpenFAST was compiled in double precision on both systems?

I think using single precision for linearization is a large part of the issue. I was able to get a non-singular mass matrix when using double precision, which is the...

@RBergua, thanks for providing the expected frequencies. I still had a non-zero`AddF0(3)` which was giving incorrect frequencies. Now when using the tight coupling branch compiled in double precision on Windows,...

@jjonkman I think the recommendation is to use double precision when performing a linearization analysis. All of the linearization glue code in tight coupling is in double precision so the...

I'm not familiar with the `.exp` file. What is it used for?