Femap is the software application published by MFB Geo Consulting that features a module or file named `femapnx_nas_advnonlin_fep`.
Femap is a finite element analysis (FEA) pre- and post-processing software developed primarily for use with engineering simulation applications. The `femapnx_nas_advnonlin_fep` refers to a specific aspect of Femap related to advanced nonlinear finite element analysis using the NAS (Nastran) solver. This module