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  • Documentation

    How Can I Upload an Assembly to SimScale?

    The aim of this article is to show how you can upload your CAD assembly into the SimScale Workbench.

    Best Practices

    The figure below is a pressure tool that has been created as an assembly and will be an example on how we can successfully upload assemblies to SimScale.

    assembly of pressure tool that consists of four parts
    Figure 1: Assembly of pressure tool in SolidWorks

    Firstly, to successfully upload the pressure tool, create a folder that has the assembly file (*.sldasm or *.iam) and the parts that make up that assembly. For example, the figure below shows the assembly file of the pressure tool and the parts that make up the pressure tool.

    folder structure for uploading assembly into simscale
    Figure 2: Assembly folder that has the assembly file and the parts making up the assembly

    Keep in mind!

    If sub-assemblies exist, the software first checks if the archive name matches any assembly name in the archive – and we use this assembly as a root assembly of the import.
    If not, it then checks the first assembly file alphabetically and uses this file as a root (parent) assembly of the import.
    Numerical values like “0” can be used as prefix for naming files to align them to the top.

    Next, you will need to create a .zip file of this folder. This .zip file is what will be uploaded into SimScale. The process of uploading the .zip file is similar to uploading a single CAD file. The only difference is that you will need to select the corresponding assembly file format.

    steps on how to upload assembly to simscale
    Figure 3: Uploading assembly into SimScale with the corresponding file format selected

    After the import has finished, the model is ready to use for a simulation.

    view of assembly after successful upload in simscale
    Figure 4: Successful assembly upload operation in SimScale


    While uploading the assembly to the SimScale platform it is possible that you receive the following error:

    “The archive contains files with invalid UTF-8 characters. Please remove all non UTF-8 characters or create an archive with a different tool. Error code: xxxxxxx”

    This error might arise due to file names containing special characters. Try using simple file names for the parts and upload the assembly again.


    If none of the above suggestions solved your problem, then please post the issue on our forum or contact us.

    Last updated: April 5th, 2022