Asking for help about rhino_3gs

I have already installed rhino_3gs successfully. But after I closed Rhino and then opened it again, rhino_3gs occured an error with the button “create primal diagram”, which said, “max is an empty sequence”.
Then I uninstalled 3gs and installed 3gs again, 3gs ran correctly. But everytime when I opened Rhino after closing it, 3gs always occurs an error. How should I solve this?
PS: Does anyone have manual or tutorial of 3gs? I’m new on this.
Thanks soooo much!

Hi @Ziv, thanks for posting here for the first time! I am no expert on 3gs but the error you mention might suggest you are trying to create a “primal diagram” from some form of invalid input (be it geometrical or not). Do you want to post a file where the error you saw is can be replicated or a screenshot of what you see in Rhino when this error pops up?

Hi @arpastrana , thanks for your reply.
First, I created a simple tetrahedron. And then, I wanted to create a force diagram, it’s OK. But when I wanted to create a primal diagram, an error occured like this. (Sry, I cannot put image in the reply.)
Exception Occured
Message: max() arg is an empty sequence.
Traceback:
line unknown, in , “”
line 99, in check_eq, “C:\Users\AppData\Roaming\McNeel\Rhinoceros\6.0\scripts\compas_3gs\rhino\objects\formnetworkobject.py”
line 55, in RunCommand, “C:\Users\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\PythonPlugins\3GS{7ce56e93-79c1-44ac-9716-1a53ca42ac9c}\dev\TGS_primal_cmd.py”
line 1, in , “”

Next, I tried to create a reciprocate diagram. I set the alpha and vertices. Another error occured like this.
Exception Occured
Message: max() arg is an empty sequence.
Traceback:
line unknown, in , “”
line 99, in check_eq, “C:\Users\AppData\Roaming\McNeel\Rhinoceros\6.0\scripts\compas_3gs\rhino\objects\formnetworkobject.py”
line 131, in RunCommand, “C:\Users\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\PythonPlugins\3GS{7ce56e93-79c1-44ac-9716-1a53ca42ac9c}\dev\TGS_reciprocate_cmd.py”
line 1, in , “”

I don’t know whether I did it correctly or not. I’m confused now.
Thanks again!

PS: I found that rhino_3gs and rhinoVAULT2 are not compatible.

@juney would you mind having a look at this?

Hi @Ziv, and thanks @arpastrana for the reply.

From what you have described here, I presume that you have created a polyhedral force diagram from a single tetrahedron. A single-cell force diagram means that the primal diagram has only one vertex, and does not have any edges. This is why you are getting the error messages you mentioned. Try with at least two cells, then these errors should go away.

Hi @juney, it’s an honor to have you reply. I will give it a try in rhino and read your thesis more carefully.