Issues with CAD File Import using Interchange in Unreal Engine 5.5

Development Pipeline & Plugins
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1

Hello,

I am setting up a pipeline to process CAD files using Interchange in Unreal Engine 5.5. However, I am encountering several issues with different file types:

  1. Wire Files
    When importing .wire files via Interchange (either “Import into Level” or into the Content Browser), DataPrepAsset, or Datasmith Import into the Scene (with CADKernel enabled or disabled), I get the following error:

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000098

libalias_api
libalias_api
libalias_api
libalias_api
libalias_api
UnrealEditor_WireInterface2025_0
UnrealEditor_WireInterface2025_0
UnrealEditor_WireInterface2025_0
UnrealEditor_WireInterface2025_0
UnrealEditor_WireInterface2025_0
UnrealEditor_WireInterface2025_0
UnrealEditor_WireInterface2025_0
UnrealEditor_WireInterface2025_0
UnrealEditor_WireInterface2025_0
UnrealEditor_DatasmithWireTranslator
UnrealEditor_DatasmithInterchange
UnrealEditor_DatasmithInterchange
UnrealEditor_InterchangeImport
UnrealEditor_InterchangeCore
UnrealEditor_InterchangeCore
UnrealEditor_InterchangeCore
UnrealEditor_InterchangeCore
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll

This issue does not occur in 5.4 when using Datasmith Import, but Interchange doesn’t seem to support .wire files in 5.4 either. Additionally, the CAD Cache is not used with Interchange in 5.4.

  1. STEP and 3DXML Files
    When using Interchange Import into Level, these files result in Static Mesh Actors being created but no Static Mesh Assets in the Content Browser.
    Direct import into the Content Browser works, but no import dialog appears, and the CAD Cache is not linked to these assets.

  2. CATProduct/CATPart Files
    Importing these files via Interchange Import into Level works well, but there is no reimport dialog to modify the import parameters afterward even though right click, reimport, works well.
    When attempting to import a large CATProduct file (~866,000 Actors) via Interchange Import into Level, the editor becomes unresponsive even after waiting a long time.
    Using DataPrepAsset with this file also crashes after some time. The only method that works is importing directly via Datasmith Import into the Level, but this does not allow for automating data processing beforehand.

  3. IGS Files
    Although I do not work with .igs files often, I tested them via Interchange and encountered errors when importing into the Content Browser.

Are these known issues with Interchange in Unreal Engine 5.5? Are there workarounds or fixes available to address these problems?

Thank you for your support!