SimScale CAE Forum

Imported Model can not be vizualized / not valid geometry

Hello

I have been uploading many model changes for my full car FSAE simulations due to constant mesh failures. (unrelated issue) and the latest model failed to import.

Here is the link
Here is the error code
image

I was importing Parasolid files using soidworks and have had no problems up until now.

I also tried using the native solidworks file and get this error immediately. How is a native solidworks file not a valid format?
image

I have no idea how every model imports fine and now this. Any ideas? @jousefm

Thanks,

Dan

Hey Dan!

Very odd, never encountered this before? Can you share the geometry with full access to Drive via email (jmurad@simscale.com)? I will forward your mail to the CAD team.

Best,

Jousef

Jousef,

Thanks so much for taking the time to answer on a sunday! I sent you the parasolid and solidworks files through my google drive. Let me know if you have access to everything

Dan

Hey Dan!

Can access it and forwarded it to my colleague @afischer, he might get back to you soon.

Cheers and enjoy the rest of your weekend!

Jousef

1 Like

Hi Dan (@dschroeder)!

  • If you upload a SolidWorks assembly to SimScale, you need to create a compressed archive e.g. zip with all parts and (sub-)assembly files and make sure the root assembly comes alphabetically first (we will improve the UX, but right now that’s how it works). It’s also described in our documentation: https://www.simscale.com/knowledge-base/solidworks-autodesk-assembly-upload/
  • If I do that with your assembly I can upload the model, but get a faceted version of it (see the facet fault and the display mode in the viewer). I am not an expert of the SolidWorks file format, but my assumption is that it imports the visualization as model here as the part files are missing (only the 2.1_R_19.SLDASM is available).
  • That you got an invalid format error is not correct, I created a ticket for this, you should have gotten an warning that linked parts a missing. Thanks for pointing that out.
  • Your x_t upload fails in the tessellation step that is needed to visualize the model in the viewer. Obviously that should work. We need to take a look unfortunately. Just to explain a bit: It is very counter-intuitive or surprising if you make very small changes and suddenly such an error happens, but already small changes can lead to precision changes or geometrical artifacts e.g. very thin, sliver faces and can lead therefore to issues downstream.
  • One of our development teams is currently working on a potential fix, so let me update in the course of this week.

Best Alex

1 Like

Alex,

Thank you so much for this detailed reply! I appreciate the time that the Simscale team takes to solve these problems. It was surprising that the x_t upload failed suddenly after such a small change but i understand the sensitivity of this whole process. I will keep trying to get my geometries to work in the mean time.

Thanks a lot!

Dan

Hi Dan,

we seem to have a fix that works for your model. Unfortunately this is still a screenshot from the development system, so I can’t share it with you yet:

I keep you updated.

Best Alex

Alex,

Thanks for sticking with this. I just tried a STEP file and it worked! I know Simscale is saying native / parasolid are the best for uploading but i have had no problems with STEP in the past. It really doesnt matter which file format i use, as long as it works

Thanks

Dan

1 Like