# No Solid Body **URL:** \ **Category:** Project Support\ **Created:** [September 5, 2022, 11:40am UTC](https://www.simscale.com/forum/t/no-solid-body/96093 "2022-09-05T11:40:55Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Nightmare23h](https://www.simscale.com/forum/user_avatar/www.simscale.com/nightmare23h/32/42165_2.png) [@Nightmare23h](https://www.simscale.com/forum/u/Nightmare23h)\ **Post date:** [September 5, 2022, 11:40am UTC](https://www.simscale.com/forum/t/no-solid-body/96093/1 "2022-09-05T11:40:55Z")
Hello, when i try to add a flow volume my model of a W11 it gives an Error “no solid body” > **[SimScale Login](https://www.simscale.com/workbench/?pid=243186796848757282&mi=geometry%3A40&mt=GEOMETRY)** > > Log in to your SimScale account. SimScale makes high-fidelity engineering simulation technically and economically accessible. At any scale. In the cloud. thanks for your help. sincerley, Matthew ---
**Author:** ![ggiraldof](https://www.simscale.com/forum/user_avatar/www.simscale.com/ggiraldof/32/30298_2.png) [@ggiraldof](https://www.simscale.com/forum/u/ggiraldof)\ **Post date:** [September 5, 2022, 6:41pm UTC](https://www.simscale.com/forum/t/no-solid-body/96093/2 "2022-09-05T18:41:44Z")
Hey Matthew, nice model you have here! Did you build it? The flow volume extraction operation fails most likely because your model is only made up of surfaces, and the surfaces do not form closed volumes. I can also see that you already tried a few CAD mode operations, am I right? In order to overcome this, please try going back to your CAD program and cleaning up the model: - Remove small parts - Join surfaces - Create enclosed volumes from the surfaces ---
**Author:** ![Nightmare23h](https://www.simscale.com/forum/user_avatar/www.simscale.com/nightmare23h/32/42165_2.png) [@Nightmare23h](https://www.simscale.com/forum/u/Nightmare23h)\ **Post date:** [September 5, 2022, 7:53pm UTC](https://www.simscale.com/forum/t/no-solid-body/96093/3 "2022-09-05T19:53:36Z")
Hello there, yeah it is! No, it is a model I bought to use for my Matura Thesis. Can I do those steps you mentioned in the Simscale CAD program? Because if yes I do not find them. ---
**Author:** ![ggiraldof](https://www.simscale.com/forum/user_avatar/www.simscale.com/ggiraldof/32/30298_2.png) [@ggiraldof](https://www.simscale.com/forum/u/ggiraldof)\ **Post date:** [September 5, 2022, 8:54pm UTC](https://www.simscale.com/forum/t/no-solid-body/96093/4 "2022-09-05T20:54:55Z")
Hello! Sadly you can not currently do the proper fixing in our CAD mode. As this will involve manipulating and joining surfaces, you will need a fully fledged CAD tool. ---
**Author:** ![Nightmare23h](https://www.simscale.com/forum/user_avatar/www.simscale.com/nightmare23h/32/42165_2.png) [@Nightmare23h](https://www.simscale.com/forum/u/Nightmare23h)\ **Post date:** [September 7, 2022, 9:28am UTC](https://www.simscale.com/forum/t/no-solid-body/96093/5 "2022-09-07T09:28:30Z")
Hey there, I tried it with Fusion and onshape but I dont seem to be able to do anything to the model to make it work, any chance you can help me out? Sincerely, Matthew ---
**Author:** ![ggiraldof](https://www.simscale.com/forum/user_avatar/www.simscale.com/ggiraldof/32/30298_2.png) [@ggiraldof](https://www.simscale.com/forum/u/ggiraldof)\ **Post date:** [September 7, 2022, 2:40pm UTC](https://www.simscale.com/forum/t/no-solid-body/96093/6 "2022-09-07T14:40:35Z")
Hi Matthew, I will be happy to help you to progress your simulation, so let me know how you think I can support you here. ---
**Author:** ![Nightmare23h](https://www.simscale.com/forum/user_avatar/www.simscale.com/nightmare23h/32/42165_2.png) [@Nightmare23h](https://www.simscale.com/forum/u/Nightmare23h)\ **Post date:** [September 11, 2022, 9:23pm UTC](https://www.simscale.com/forum/t/no-solid-body/96093/7 "2022-09-11T21:23:49Z")
Hello there, I’ve now again tried my luck with fixing the Mercedes Model (f1) but I can’t get it to work. It always says that theres no solid body. Can you give me a detailed way how to fix that problem? Because the model is already meshed if i open it in Fusion, so I can’t seem to join surfaces. Kind Regards, Matthew ---
**Author:** ![ggiraldof](https://www.simscale.com/forum/user_avatar/www.simscale.com/ggiraldof/32/30298_2.png) [@ggiraldof](https://www.simscale.com/forum/u/ggiraldof)\ **Post date:** [September 12, 2022, 3:06pm UTC](https://www.simscale.com/forum/t/no-solid-body/96093/8 "2022-09-12T15:06:52Z")
Hi there! Instructions on fixing your CAD is outside of the scope of this forum, and even instructions would be program specific, so I don’t see how to help you here. Just try to modify or recreate the surface parts to make the closed and smooth, and try to convert them to solid parts with an enclose operation.