Unable to export mesh support file for Flux in SimLab motor NVH example

jy6315

Hello,

I am following the Flux-SimLab / Flux-SimLab-OptiStruct Electric Motor NVH example.

At the SimLab mesh export step, the tutorial says to select the stator tooth faces and then use:

Advanced > Trials > Flux

This should create the mesh support file:

Mesh_SimLab_ForFlux.fem

However, in my case the .fem file is not created.

I tested this on different PCs and with both SimLab 2025 and SimLab 2026, and the same issue occurs.

The FLUX body/support object is created in the Assembly Browser, and the Quad4 mesh seems to be generated. The Output Window shows:

No of Nodes: 912
No of Quad4 Elements: 648

However, the final .fem file is not exported.

The Session Log shows the following:

getSelectedEntities: Passed
Create Body From Faces: Passed
RenameBody: Passed
ExportGda: Failed
DeleteEntity: Passed
NewDocument: Passed
ImportGda: Failed
Failed to load file
Modify Elements: Failed
Please select at least one body or one face.
ExportStaticSolverInput: Failed
No model to export

I also checked that both the working folder and the SimLab temporary folder are writable.

Working folder write test: Passed
%TEMP% write test: Passed
%TEMP%\SimLab\SimLab_2026\Temp write test: Passed

So it does not seem to be a simple folder permission issue.

My questions are:

1. Is the Advanced > Trials > Flux mesh support export workflow still supported in SimLab 2025/2026?
2. Is this workflow supported in Student Edition?
3. Why does ExportGda fail even though the selected faces and Quad4 mesh are created?
4. If this workflow is no longer recommended, what is the correct way to create Mesh_SimLab_ForFlux.fem for Flux force computation support?
5. Is there a way to manually export only the generated Quad4 FLUX/support mesh body as an OptiStruct/Nastran .fem file?

Lavanya Vadamodala_20519

Hi,

Here are the answers to your questions :

1. Yes, it works for SimLab 2025/2026. Do you see a pop up window when you click on Advanced < Trials < Flux after selecting the stator Teeth faces?
2. It should work irrespective of Student or professional edition. I will check and confirm.
3. I checked it from my side. It is working for the meshed model used in example. Are you using same model or different one? If it is different, can you share the model? (If you share the model here, it is public). You can create a ticket in support center . I can respond from there.
4. There is force computation feature directly available in SimLab. This is the recommended method. I have attached the help document for more information.
5. The other way is to Open Flux model < Go to import/export context < create data support for stator teeth faces. Then export the mesh in optistruct/.fem file.

Thank you,

Lavanya