topic Re: Starting over in Simulation environment in Fusion Support Forum

Starting over in Simulation environment

Neil_Roberts — Sun, 22 Mar 2026 15:44:36 GMT

A simulation model stopped updating the part geometry due to design changes. I tried everything that I could think of to prompt the software to update the model, and ended up with no geometry in the simulation environment. The part is highly complex, so remodeling from scratch is not an option. Is there a way to make Fusion forget that it ever entered the Simulation environment so that I can start over?

Re: Starting over in Simulation environment

dsouzasujay — Mon, 23 Mar 2026 01:22:19 GMT

Hi @Neil_Roberts ,

Thanks for the detailed explanation, this helps clarify the situation.

From what you described, it is very likely that the simulation setup (loads, constraints, contacts) lost its references after changes were made to the model geometry.

Suggestion:

Go back to a previous version

Fusion automatically saves a new version whenever you make changes and run/modify a simulation.

Open the Data Panel → Version History
Go back to a version where the simulation was working correctly
From there, you can either:
- Continue working from that version
- Or compare changes and carefully reapply modifications

Simplify before re-running: Don't use the Design/model workspace to modify the design, use Simplify

Consider creating a simplified version (remove small features)
Then run simulation on that

If above steps wont work, then to better understand what happened, could you please share:

A screenshot of the Simulation browser
A short video of what you see (especially “no geometry” state)

Re: Starting over in Simulation environment

navya_gelli — Wed, 25 Mar 2026 10:27:48 GMT

Hello, @Neil_Roberts,

Did the information provided by @dsouzasujay help you and answer your question?

If yes, please click on the "Accept Solution" button. This will assist other community users in finding and benefiting from this information.

If not, please do not hesitate to give an update in this thread so all community members receive an update on the progression of your question, and can suggest next steps that may be helpful for you to achieve what you're looking for.

All the best,

Navya | Community Manager