3d node number display

[wooj]

Hello everyone, i am a newbie in opensees and i got stuck to display 3d modeling with node number.
Here's my error
DisplayModel3D nill;

Press "N" then, it stuck on the program.
Can anyone know the error?

[mhscott]

If you are new to OpenSees, I recommend you work with OpenSeesPy which has many visualization packages available.