Dear Fergus, The new NX NASTRAN MultiStep Nonlinear Solver (SOL401) native from SIEMENS will be supported in FEMAP after releasing NX Nastran V12, so hopefully it will be available at the end of the year 2017 (or most probably early 2018). At that time we will have a FEMAP product for NX NASTRAN (SOL401). Until then, FEMAP cannot set up the solve for it, sorry!.
Best regards, Blas.
Blas Molero Hidalgo, Ingeniero Industrial, Director IBERISA • 48004 BILBAO (SPAIN) WEB: http://www.iberisa.com Blog Femap-NX Nastran: http://iberisa.wordpress.com/