Problem with simulation of a n- mosfet in pspice
For some reason I don't understand the model provided in the eval.lib under the pspice directory is not working, so I take these steps to solve it


Look for another version of the eval.lib that found here
Open it with the model editor
Without modifying exported via File> Export to Capture Part Library to create the .lib and .olb objects
If you received a message of 0 errors then its ok.
Inside your project you have to add to the path of work, so you have to make right click in the “Library” folder, then add file, look for the .lib you just make.
In the dialog of selecting file type you choose "Schematic library" and then ok
Left click the .LIB file you just added and Ctrl+C.
Left click the "Model Libraries” folder and the Ctrl+V
The lib model must be in both the Library and Model library folders

That´s it, after that it run well.