Create empty DataTree error in GhPython

I'm somewhat new to Python, so maybe this is something pretty obvious that i'm just not seeing. Whenever I try to create an empty DataTree:

import Rhino
import clr
clr.AddReference("grasshopper")
from Grasshopper import DataTree

tree = DataTree[Rhino.Geometry.Point3d]()

It gives me an error:

Runtime error (MissingMemberException): 'type' object has no attribute '__index__'

Traceback:
line 6, in script

Any thoughts?

Replies to This Discussion

Permalink Reply by Ivan Tavarez Blanco on December 30, 2012 at 11:00am

Problem solved... It seems that I didn't have the latest version of the python plugin.

Permalink Reply by Archy Bloom on May 16, 2013 at 11:16am

I get same problem with newest 5.1. What should I do?

Permalink Reply by marshall prado on July 29, 2013 at 9:05am

Same problem, any solution?

Permalink Reply by Anders Holden Deleuran on July 30, 2013 at 7:06am

First check that you are running the latest versions:

Rhino: Version 5 SR5 (5.5.30717.16015, 07/17/2013)
GH: 0.9.0056
GHPython: 0.5.1.0

You can check the GHPython component version by opening the editor, the version number should be displayed in the lower right corner.

If you are still getting the same error you might want to log it as an issue on the McNeel Github.