SalMo

> @gonzalocasas do you remember which version was it saved with? and which version are you reading it with now? I think it was saving with 0.16.0 and reading with...

Hi Tom, I am working with the latest compas version from compas source: **'0.17.2-c422420c'**, when I save a mesh, **mesh.to_json**, in python, I cannot load the mesh, **mesh.from_json**, in Ironpython,...

Also, I have been trying a similar process with network.to_json in python and loading it in Ironpython (network.from_json), I am able to load it, but it gives me the an...

Also, tried **network.to_data** in python and loaded the data dictionary in Ironpython, which the correct dictionary, when it is loaded in Ironpython. Still get an empty network, while trying **network.from_data**

**In case of the mesh datastructure:** I making the mesh in Python using **Mesh.from_vertices_and_faces**, save it with **Mesh.to_json** and load it in Ironpython with **Mesh.from_json** and get the mentioned error.

In case of the network datastructure: I making the network in Python using **Network.from_nodes_and_edges**, save it with **Network.to_json** and load it in Ironpython with **Network.from_json** and get an empty network.

> not sure if this is the source of the problem, but on the CPython side you seem to be loading a `Mesh` and on the IronPython side a `Network`....

[Datastructures.zip](https://github.com/compas-dev/compas/files/5519348/Datastructures.zip)

Are you using the latest compas version in Rhino? I am saving to json with 0.17.2-c422420c and drawing with 0.16.1. If I save to json and load json in version...