# CAD Mode Support **URL:** https://www.simscale.com/forum/c/cad-mode/103.md [Latest](https://www.simscale.com/forum/latest.md) · [Categories](https://www.simscale.com/forum/categories.md) --- ## [Introducing CAD Mode](https://www.simscale.com/forum/t/introducing-cad-mode/91335)
**Author:** [@anon38053885](https://www.simscale.com/forum/u/anon38053885)\ **Replies:** 3\ **Last updated:** [January 27, 2021, 7:15pm UTC](https://www.simscale.com/forum/t/introducing-cad-mode/91335 "2021-01-27T19:15:16Z")
Welcome to the CAD Mode forum! SimScale CAD Mode is a brand new addition to our comprehensive list of functionalities, and allows you to perform CAD pre-processing operations within the SimScale environment. Currently in… --- ## [About the CAD Mode Support category](https://www.simscale.com/forum/t/about-the-cad-mode-support-category/91315)
**Author:** [@jousefm](https://www.simscale.com/forum/u/jousefm)\ **Replies:** 0
Welcome to the CAD Mode forum! SimScale CAD Mode is a brand new addition to our comprehensive list of functionalities, and allows you to perform CAD pre-processing operations within the SimScale environment. Currently in… --- ## [Internal flow Region errors](https://www.simscale.com/forum/t/internal-flow-region-errors/100995)
**Author:** [@BrentVergeer](https://www.simscale.com/forum/u/BrentVergeer)\ **Replies:** 1\ **Last updated:** [April 23, 2026, 3:19pm UTC](https://www.simscale.com/forum/t/internal-flow-region-errors/100995 "2026-04-23T15:19:48Z")
Hi Simscale, I have been trying to give my “Cleanroom” simulation an internal flow region. Assigning the Seed and boundary faces to any of the model faces is not working. What is the reason why these errors keep coming … --- ## [I can't add new model from my computer](https://www.simscale.com/forum/t/i-cant-add-new-model-from-my-computer/100858)
**Author:** [@summer19981201](https://www.simscale.com/forum/u/summer19981201)\ **Replies:** 1\ **Last updated:** [March 13, 2026, 10:54pm UTC](https://www.simscale.com/forum/t/i-cant-add-new-model-from-my-computer/100858 "2026-03-13T22:54:25Z")
I add a simple model but failed,the file former is .prt or .xt,i create a new counter and use an another computer,the result is the same,how can i solve the problem , --- ## [Object inside the fluid](https://www.simscale.com/forum/t/object-inside-the-fluid/100821)
**Author:** [@melvinaIN2](https://www.simscale.com/forum/u/melvinaIN2)\ **Replies:** 1\ **Last updated:** [March 9, 2026, 3:37pm UTC](https://www.simscale.com/forum/t/object-inside-the-fluid/100821 "2026-03-09T15:37:19Z")
Hi all, I have a problem that i want to have some furniture inside my simulation geometry. but it seem the room detect that has overlapping geometry. I set the furniture under boundary condition as walls (adiabatic), a… --- ## [Operation could not be created issue](https://www.simscale.com/forum/t/operation-could-not-be-created-issue/100804)
**Author:** [@Angusangus](https://www.simscale.com/forum/u/Angusangus)\ **Replies:** 1\ **Last updated:** [March 2, 2026, 3:44pm UTC](https://www.simscale.com/forum/t/operation-could-not-be-created-issue/100804 "2026-03-02T15:44:10Z")
Trying to create a subtraction of a car with an external flow volume. When making the target body the flow region and the tool, the car, I get this issue. (Error code: LgTnELKD) Url: qweqwe | SimScale Workbench --- ## [Not able visualize step file in simscale](https://www.simscale.com/forum/t/not-able-visualize-step-file-in-simscale/100779)
**Author:** [@shiva123](https://www.simscale.com/forum/u/shiva123)\ **Replies:** 1\ **Last updated:** [February 19, 2026, 5:12pm UTC](https://www.simscale.com/forum/t/not-able-visualize-step-file-in-simscale/100779 "2026-02-19T17:12:12Z")
--- ## [Invalid Enclosure Volume](https://www.simscale.com/forum/t/invalid-enclosure-volume/100661)
**Author:** [@aryan\_srivasta](https://www.simscale.com/forum/u/aryan_srivasta)\ **Replies:** 2\ **Last updated:** [January 17, 2026, 5:50am UTC](https://www.simscale.com/forum/t/invalid-enclosure-volume/100661 "2026-01-17T05:50:41Z")
Hi, I’m following the following tutorial on CFD on an FS Car: https://www.simscale.com/docs/tutorials/formula-student-car/ In section 1.1, it asks us to edit a copy of our CAD to create an external flow volume. I’m not … --- ## [I need help with repairing my 3D CAD](https://www.simscale.com/forum/t/i-need-help-with-repairing-my-3d-cad/100397)
**Author:** [@Aerodynamics3D](https://www.simscale.com/forum/u/Aerodynamics3D)\ **Replies:** 1\ **Last updated:** [September 15, 2025, 4:06pm UTC](https://www.simscale.com/forum/t/i-need-help-with-repairing-my-3d-cad/100397 "2025-09-15T16:06:05Z")
I need help prepairing my 3d model for simulation I want to measure the drag coefficient of a 3d model car i purchased from 3d.org there are error’s with my model its not watertight. I don’t have cad experience. I need… --- ## ["Each face must have only a single boundary condition or interface assignment](https://www.simscale.com/forum/t/each-face-must-have-only-a-single-boundary-condition-or-interface-assignment/100200)
**Author:** [@alfatha](https://www.simscale.com/forum/u/alfatha)\ **Replies:** 1\ **Last updated:** [July 4, 2025, 4:24pm UTC](https://www.simscale.com/forum/t/each-face-must-have-only-a-single-boundary-condition-or-interface-assignment/100200 "2025-07-04T16:24:35Z")
Hi SimScale community, I’m currently working on a Conjugate Heat Transfer (CHT) simulation for a transformer radiator panel. When trying to run the simulation, I encountered the following error: “Please ensure that ea… --- ## [unable to upload file of solidworks assembly](https://www.simscale.com/forum/t/unable-to-upload-file-of-solidworks-assembly/100092)
**Author:** [@aweldegebriel](https://www.simscale.com/forum/u/aweldegebriel)\ **Replies:** 1\ **Last updated:** [May 23, 2025, 6:49pm UTC](https://www.simscale.com/forum/t/unable-to-upload-file-of-solidworks-assembly/100092 "2025-05-23T18:49:56Z")
i am new member of this community. i want to do simulation online and i get SimScale best for this but while uploading my desgined cad files(solidworks assembly), i am getting error to many times. I couldn 't to unde… --- ## [preparing good cad model ](https://www.simscale.com/forum/t/preparing-good-cad-model/100072)
**Author:** [@gullan](https://www.simscale.com/forum/u/gullan)\ **Replies:** 1\ **Last updated:** [May 16, 2025, 3:41pm UTC](https://www.simscale.com/forum/t/preparing-good-cad-model/100072 "2025-05-16T15:41:36Z")
hi, the project i work on a traditional house with organic layers of wall, floor, and roof, I have problem in mesh generating. while the building material must be identified for each element , the mesh generating failed … --- ## [How i repair geometry](https://www.simscale.com/forum/t/how-i-repair-geometry/100041)
**Author:** [@mohammady](https://www.simscale.com/forum/u/mohammady)\ **Replies:** 2\ **Last updated:** [May 8, 2025, 7:14am UTC](https://www.simscale.com/forum/t/how-i-repair-geometry/100041 "2025-05-08T07:14:25Z")
i have problem and i need to dolet any thing or fixed it or repair to i can make simelasone plz could you help me --- ## [Mesh Operation failed" due to a self intersection in the mesh](https://www.simscale.com/forum/t/mesh-operation-failed-due-to-a-self-intersection-in-the-mesh/100011)
**Author:** [@felipe\_lee\_202](https://www.simscale.com/forum/u/felipe_lee_202)\ **Replies:** 2\ **Last updated:** [May 5, 2025, 10:44am UTC](https://www.simscale.com/forum/t/mesh-operation-failed-due-to-a-self-intersection-in-the-mesh/100011 "2025-05-05T10:44:36Z")
Hello: I am trying to run a dynamic simulation of a Forumla one car crashing into a barrier. The problem I am having is a meshing issue “Mesh Operation failed” due to a self intersection in the mesh. However, by placin… --- ## [Rescaling the unit of geometry](https://www.simscale.com/forum/t/rescaling-the-unit-of-geometry/99901)
**Author:** [@bale19](https://www.simscale.com/forum/u/bale19)\ **Replies:** 1\ **Last updated:** [March 19, 2025, 2:11pm UTC](https://www.simscale.com/forum/t/rescaling-the-unit-of-geometry/99901 "2025-03-19T14:11:03Z")
I have all the geometry in a file with the extension x\_t or x\_b, I import it. But it perceives the unit as meters, I want it to be millimeters. I exported the geometry file from another software, and I am sure I selected… --- ## [Flow region couldn't be created](https://www.simscale.com/forum/t/flow-region-couldnt-be-created/99886)
**Author:** [@abengani](https://www.simscale.com/forum/u/abengani)\ **Replies:** 1\ **Last updated:** [March 17, 2025, 9:34pm UTC](https://www.simscale.com/forum/t/flow-region-couldnt-be-created/99886 "2025-03-17T21:34:36Z")
When I make my flow region for my car I create it so that it only simulates half of the car. It normally works but this time it said that it could not be created due to the following problematic entities. It then said to… --- ## [Model tolerance](https://www.simscale.com/forum/t/model-tolerance/99833)
**Author:** [@krossos](https://www.simscale.com/forum/u/krossos)\ **Replies:** 1\ **Last updated:** [February 26, 2025, 12:16pm UTC](https://www.simscale.com/forum/t/model-tolerance/99833 "2025-02-26T12:16:08Z")
How do I reduce CAD model tolerance. I cannot find ‘repair CAD’ tool in simple when editing a copy of my design. --- ## [How to change the Model Orientation](https://www.simscale.com/forum/t/how-to-change-the-model-orientation/99812)
**Author:** [@sverga](https://www.simscale.com/forum/u/sverga)\ **Replies:** 2\ **Last updated:** [February 22, 2025, 10:46am UTC](https://www.simscale.com/forum/t/how-to-change-the-model-orientation/99812 "2025-02-22T10:46:47Z")
Hello! I would like to know if the orientation where the CAD model is facing can be changed (x,y, and z-axis) in order to not confuse myself in inputting values? --- ## [Particle trace function not working](https://www.simscale.com/forum/t/particle-trace-function-not-working/99708)
**Author:** [@Owura](https://www.simscale.com/forum/u/Owura)\ **Replies:** 6\ **Last updated:** [February 5, 2025, 10:06pm UTC](https://www.simscale.com/forum/t/particle-trace-function-not-working/99708 "2025-02-05T22:06:10Z")
When i select the particle trace function when processing my results, it is unsuccessful. There is no feedback. it keeps loading then nothing happens after loading. Unable to move on to select faces and the rest to view … --- ## [SimScale does not recognises my body as a solid](https://www.simscale.com/forum/t/simscale-does-not-recognises-my-body-as-a-solid/99750)
**Author:** [@krossos](https://www.simscale.com/forum/u/krossos)\ **Replies:** 1\ **Last updated:** [February 3, 2025, 6:16pm UTC](https://www.simscale.com/forum/t/simscale-does-not-recognises-my-body-as-a-solid/99750 "2025-02-03T18:16:48Z")
I am importing a model in order to create a simulation and test aerodynamics. I am importing the CAD model as a STEP file. Then I add an external flow box around it. I am preparing the simulation and then ready to mesh t… --- ## [Scaling Errors](https://www.simscale.com/forum/t/scaling-errors/99732)
**Author:** [@ColinH98](https://www.simscale.com/forum/u/ColinH98)\ **Replies:** 1\ **Last updated:** [January 28, 2025, 8:27pm UTC](https://www.simscale.com/forum/t/scaling-errors/99732 "2025-01-28T20:27:02Z")
I run into some errors when trying to scale my model down. The programme imports my model on a scale 3 times higher than the original. When I try to scale down by 0.001 I get the error seen in the screenshot. What are t… --- ## [Newbie needing help with facet geometry](https://www.simscale.com/forum/t/newbie-needing-help-with-facet-geometry/99712)
**Author:** [@harryfeng](https://www.simscale.com/forum/u/harryfeng)\ **Replies:** 1\ **Last updated:** [January 25, 2025, 10:15am UTC](https://www.simscale.com/forum/t/newbie-needing-help-with-facet-geometry/99712 "2025-01-25T10:15:01Z")
pls help with the faults. i think most of it is coming from the tires, but ive no idea what to do --- ## [PLEASE HELP! Geometry solid body problem when creating external flow volume](https://www.simscale.com/forum/t/please-help-geometry-solid-body-problem-when-creating-external-flow-volume/99714)
**Author:** [@harryfeng](https://www.simscale.com/forum/u/harryfeng)\ **Replies:** 6\ **Last updated:** [January 26, 2025, 2:55pm UTC](https://www.simscale.com/forum/t/please-help-geometry-solid-body-problem-when-creating-external-flow-volume/99714 "2025-01-26T14:55:45Z")
pls help with the faults. i think most of it is coming from the tires, but ive no idea what to do --- ## [Cant create fluid volume from the geometry](https://www.simscale.com/forum/t/cant-create-fluid-volume-from-the-geometry/99588)
**Author:** [@mdip](https://www.simscale.com/forum/u/mdip)\ **Replies:** 4\ **Last updated:** [December 20, 2024, 2:23pm UTC](https://www.simscale.com/forum/t/cant-create-fluid-volume-from-the-geometry/99588 "2024-12-20T14:23:34Z")
Hello, I am having trouble to create fuid volume of this file “Onshape” I have tried a lot but failed. I hope someone would be kind enough to help me to learn. Thank you. Regards, Mohammed Ar Rahman Dip --- ## [Model orbit, movement](https://www.simscale.com/forum/t/model-orbit-movement/98774)
**Author:** [@gpanderson](https://www.simscale.com/forum/u/gpanderson)\ **Replies:** 2\ **Last updated:** [August 1, 2024, 8:21pm UTC](https://www.simscale.com/forum/t/model-orbit-movement/98774 "2024-08-01T20:21:01Z")
is there a way to centre the model/simulation so it rotates around its center rather than some unknown unseen point? I try to rotate to pick faces and the model swings off screen. --- ## [Error Message](https://www.simscale.com/forum/t/error-message/98101)
**Author:** [@TerraTitansF1](https://www.simscale.com/forum/u/TerraTitansF1)\ **Replies:** 2\ **Last updated:** [July 2, 2024, 9:17am UTC](https://www.simscale.com/forum/t/error-message/98101 "2024-07-02T09:17:36Z")
This error message has popped up when working on my project “The mesh failed because the model contains faults. This should have been caught earlier while uploading the model or inside CAD mode (if any operation was perf… --- ## [Face missing](https://www.simscale.com/forum/t/face-missing/98631)
**Author:** [@Wiphu](https://www.simscale.com/forum/u/Wiphu)\ **Replies:** 1\ **Last updated:** [July 1, 2024, 6:59pm UTC](https://www.simscale.com/forum/t/face-missing/98631 "2024-07-01T18:59:42Z")
I am preparing my CAD model for simulation. While deleting a face in CAD mode, the side diffuser also went missing. How can I prevent this issue and ensure the side diffuser remains intact? --- ## [Merging Two Faces for Internal Geometry Tool](https://www.simscale.com/forum/t/merging-two-faces-for-internal-geometry-tool/98618)
**Author:** [@tmahoney](https://www.simscale.com/forum/u/tmahoney)\ **Replies:** 10\ **Last updated:** [June 26, 2024, 8:21pm UTC](https://www.simscale.com/forum/t/merging-two-faces-for-internal-geometry-tool/98618 "2024-06-26T20:21:30Z")
I’ve uploaded my mesh CAD file from fusion 360 and its working well, except for the fact that there are two faces that should be one single face. They are part of the same body (so the boolean feature does not work). Thi… --- ## [Problem Creating Internal Flow Volume](https://www.simscale.com/forum/t/problem-creating-internal-flow-volume/98585)
**Author:** [@caroline\_turner](https://www.simscale.com/forum/u/caroline_turner)\ **Replies:** 8\ **Last updated:** [June 20, 2024, 8:35pm UTC](https://www.simscale.com/forum/t/problem-creating-internal-flow-volume/98585 "2024-06-20T20:35:15Z")
Hi. I’m trying to create an internal flow volume, but I have an error that pops up with a lot of the faces when I try to create it. When I checked for gaps, it said there weren’t any. Can you help? Sample 2 | SimScale W… --- ## [Exit and save](https://www.simscale.com/forum/t/exit-and-save/98560)
**Author:** [@jjansman](https://www.simscale.com/forum/u/jjansman)\ **Replies:** 2\ **Last updated:** [June 15, 2024, 6:22pm UTC](https://www.simscale.com/forum/t/exit-and-save/98560 "2024-06-15T18:22:40Z")
I don’t fully understand the buttons Exit and Save as Copy (as described in CAD Mode | CAD Preparation & Upload | SimScale ). Exit/Save as copy: Click ‘Save as copy’ to create a copy of your modified geometry. The new … [Next page](https://www.simscale.com/forum/c/cad-mode/103.md?page=1)