cadCAD Version: 0.4.28 doesn't work

Hi, I’m using the cadCAD for a while, and I have some simulation with it on my old machine. Today, I installed it on another machine which I think the installed version is now the latest version. but it doesn’t work! At first, I thought maybe it’s because of different versions of python, so I made sure both machines are using the same version(3.8.10), but it didn’t solve the problem. Then I checked with the tutorial code, the first one, and I got this error:

                  ___________    ____
  ________ __ ___/ / ____/   |  / __ \
 / ___/ __` / __  / /   / /| | / / / /
/ /__/ /_/ / /_/ / /___/ ___ |/ /_/ /
\___/\__,_/\__,_/\____/_/  |_/_____/
by cadCAD

cadCAD Version: 0.4.28
Execution Mode: local_proc
Simulation Dimensions:
Entire Simulation: (Models, Unique Timesteps, Params, Total Runs, Sub-States) = (0, 0, 0, 0, 0)
Execution Method: local_simulations
Traceback (most recent call last):
  File "test.py", line 64, in <module>
    raw_system_events, tensor_field, sessions = simulation.execute() # The `execute()` method returns a tuple; its first elements contains the raw results
  File "/home/user/.local/lib/python3.8/site-packages/cadCAD/engine/__init__.py", line 157, in execute
    final_result = get_final_results(simulations_results, partial_state_updates, eps, sessions, remote_threshold)
  File "/home/user/.local/lib/python3.8/site-packages/cadCAD/engine/__init__.py", line 121, in get_final_results
    for sim_result, psu, ep in list(zip(simulations, psus, eps)):
TypeError: 'NoneType' object is not iterable ```

[VHPL-UIS]

@BenSchZA No, I just copied the code from the notebook into a .py file and tried to run it. I have the 0.4.23 and it works fine.

[JEJodesty]

Thanks for the update and sorry for the delay

@VHPL-UIS @susmit @daithi-coombes despite the title of the issue, it entails updating not only robot-and-marbles-part-1 to run on 0.4.28, but also all cadCAD demos

@VHPL-UIS @susmit I suggest:

• updating your system model using the CHANGELOG which contain links to documentation
• update using the -cadcad-post-processing-modifications in addition to as suggested by @meiji163
• submitting an issue to update all cadCAD demos to run on 0.4.28 which includes robot-and-marbles-part-1

@LinuxIsCool @BenSchZA I suggest:

• if there is still an issue with jubyter lab or notebook after the steps above are complete, submit a jubyter lab and/or notebook specific issue(s) for within this repo