I would like to ask you a question concerned with displaying the geometry at Generative Design Outcomes of the dynamo study file.
Now I am learning dynamo in Civil 3D. I tried the Three Box Massing dynamo study file in revit, it worked well and the geometry was also appearing at explore outcomes. When I tried it again in Civil 3D, I got the error node at the dynamo file as below and after I run and explore outcomes, the geometry was not appearing at Studies outcomes dialog.
Is there any nodes that I could try to be able to display geometry? Could you please explain it to me?
I am really sorry for that I did not exactly know where I can download nodes. When I searched Packages at Package Manager, I did not find any names concerned with these nodes.
Could you please instruct me where could I download them or any package name that I need to install?
Remember: Generative Design isn’t integrated with Civil 3d; you’re hacking the solution together so no one has a complete ‘how to’ guide for you unfortunately,a s this isn’t a supported workflow.
To get Generative Design into Civil 3D there are a few things you have to set up. If you fail part of the setup you get this type of result, but lots of other things could be missing. Check your Generative Design logs and your Dynamo logs (based on where Generative Design launches them from, this can make troubleshooting hard but task manager will tell you what path was used if you check the command on the details tab for the DynamoWPFCLI.exe instances). One likely culprit is the newtonsoft.json.dll often found (or not found) in C:\Program Files\Autodesk\AutoCAD 20xx\C3D\Dynamo\Core, but lots of things can be the cause and only the logs can help troubleshoot.
The node you have with a missing node icon creates the instances of the mass in the Revit model after you select an outcome. On the Civil 3D side you’ll need to build a new method for this (Object.ByGeometry) would be my start point.
1.I did not find newtonsoft.json.dll file under C:\Program Files\Autodesk\AutoCAD 20xx\C3D\Dynamo\Core. I am using Civil 3D 2026 now. When I checked under C:\Program Files\Autodesk\Revit 2026. I found it. Do I need to do something with this file?
2.I tried with Object.ByGeometry node and Object.Type node. I am still getting error. I also tested the Gate node by changing by Open and Close or without using it. But it does not work.
3.When I started GD with Civil 3D, I copied and pasted the following files under C:\Program Data\Autodesk\C3D 2026\Dynamo\3.4\packages from Revit packages and I got the GD tab at dynamo. Does it workflow wrong? I used the same Dynamo packages, eg.3.4.
We can’t help solve an error you haven’t exposed. Copy the message back to here, but I would guess the Object.Type node isn’t needed.
Seems close and a good test post the resolution of number 1 above. But again there isn’t a manual or how to, and specifics for each release of Civil and Revit change which means there are a few dozen options for what could be at play here (4 releases of Revit, 3 releases of civil 3D, update sequence and timing… it gets ugly fast).
I solved the dynamo scripts error by myself and copying the newtonsoft.json.dll file as @jacob.small mentioned, worked well to display the geometry at Civil 3D.
It helped me a lot. Thank you so much.
