at Basic Nonlinear User´s Guide(bas_nonlinear.pdf) I get this information on page 2-31 related to example 2:
"The model files for this example are prplth.dat and prpltg.dat, which can be found in the examples directory (see NX Nastran Installation and Operations Guide )"
Somebody know where I get this exaples files?
if I remember correctly you have to choose to install the example files during program installation. If you did not choose it, they are not available.