Dear Neeraj,
We purposely left out the wind files from the NREL 5-MW model archives because adequately sized wind files for the NREL 5-MW are typically very large. See the last four posts on the forum topic linked here for an explanation and for a link to where you can download a TurbSim input file for this turbine: Updated NWTC Design Codes Available on Our Web Site.
Warnings regarding a “small angle approximation violation,” warnings regarding “supersonic blades,” a simulation crash, or very large deflections that occur in the time series near the start of a simulation are good signs of a numerical instability. Without knowing more about your simulation settings, it’s hard to know that what the problem is. But the NREL 5-MW turbine models should not have these problems, unless you’ve customized the model in some unphysical way. See the following forum topic for more information: NREL 5MW controls (DLL interface).
I don’t understand your question about compiling. Input files don’t need compiling and you don’t need to recompile FAST unless you need to make changes to the source code.
Best regards,