The software application published by MFB Geo Consulting that includes the feature/module/file named `femapnx_nas_nonlin_fep` is likely related to FEMAP, which is a tool for pre- and post-processing finite element analysis (FEA).
The `femapnx_nas_nonlin_fep` file/module typically refers to a feature that facilitates the integration of non-linear finite element analysis using the NASTRAN solver within the FEMAP environment. In this context,