The Rhino/Grasshopper plug-in generating and exchanging data with SAP2000 has been upgraded and now includes the option to "bake" the data directly from Grasshopper to SAP using the OAPI COM interface. No longer needed to save and import a text data file.
If you rebake variations, you might observe historic nodes being left in the model, I am still awaiting advice from CSI on an issue with deleting unattached points. There's more improvements that will quickly be implemented, if you've ideas or suggestions, please send them through.
You can download the 3 pin truss models : Rhino and Grasshoper
The basic mesh and restraint model: Grasshopper