I am having some difficulty testing C3D with Forma. As of this date, 9/29/25, which package should I be using to send geometry to Forma? Or do I need to route geometry thru revit (or sandbox) first for the time being?
-updated- When I install Dynamo Forma Beta Package, it works the 1st time in the current session. But when you close C3D and launch again, the interface to dynamo is ruined on the 2nd load. To fix, you have to uninstall the package.
-updated 2- You have to go delete the package from C\users\app\package\dynamo forma beta. The package manager will not launch, it crashes on load.
Thanks.
1 Like
I would guess it’s more of a “this is a beta technology so expect some bugs” thing, but you could also have a dependency conflict. Can you show a sample graph which is failing so I can let the team know where to look?
FYI @emrullah.yildiz
1 Like
I suspect that if you follow these steps, the “bug” will be self-evident…
- using C3D26.1, launch dynamo.
- install DynamoFormaBeta
- Close C3D26.1
- Launch C3D26.1
- Launch Dynamo (see bug)
…in the case when it is a package conflict, I am using..
1 Like
Those steps should suffice if it’s reproducible and not related to a dependency conflict or system thing.
Unfortunately the conflict can be in Civil 3D or AutoCAD, not just in Dynamo. Can you restart Civil 3D, open Dynamo, and, let the error re-occur, close Dynamo, and then post your log file here?
Here are the log files. my intuition tells me this is a simple “self-evident” type bug for anyone with C3D who goes thru the steps above.
AdlSdk-37456.7z (523 Bytes)
1 Like
Think we got the wrong logs - the ones we need are Dynamo specific, and should start with “Dynamo log started”. The are usually in %appdata%\Autodesk\C3D XXXX\Dynamo\3.Y\Logs where C3D XXXX is the Civil 3D version you’re using (i.e. C3D 2026)3.x is the Dynamo version you’re currently using (i.e. 3.4).
Several discrepancies with node conflicts which could be making unrelated noise or could be causing issues. Note that Arkance isn’t supported in 2026 (see here) so it might be the root cause for a disproportionate amount of the noise (i.e. not seeing DynamoCoreWpf, WebView2, etc.). But it could also all be the beta nature of Dynamo for Forma in the context of Civil 3D.
should I raise a helpdesk ticket on this topic? Dynamo works perfectly until such time that this package is installed, then it stops working.
For example, Arkance package is being used often for C3D26.1 in our .dyn files. So it works in 26.1.
updated
I uninstalled all packages and repeated the steps above….it failed again. So I think “package discrepancy” has been ruled out.
1 Like
On this you’re getting lucky - stability isn’t assured nor is functionality. Best to migrate to the Civil Nodes as indicated by @Anton_Huizinga in the thread above.
That said, you’re right in that it replicates without packages so therefore it isn’t the issue. A helpdesk ticket won’t be of use as you’re in a beta (Dynamo for Forma BETA after all) so we just need to wait for the dev team to chime in (it’s still early in their first day of the work week so this may take a bit).
2 Likes
Thanks for testing out the package @ddrennen2QDK2 . I was able to reproduce your issue and will highlight the problem to team. As soon as we release a new version, I will post it here 
2 Likes
Hello @ddrennen2QDK2,
Happy to share that we’ve released a new version of the DynamoFormaBeta package (version 8.0.0), which includes a fix for the issue related to Civil 3D.
Please feel free to try it out and let us know if you have any further feedback or suggestions, Your insights have been very valuable to find the bug.
1 Like
