Hi @tandeep, sorry for the late reply. I see you are using FreeCAD. I can help you with this, but I will need more information, but this forum is not the right place for detailed individual vendor support.
Can you please post here: https://forum.freecadweb.org/viewforum.php?f=39
Please include:
- A copy of your FreeCAD file that we can use to replicate the issue
- Which version of FreeCAD you are using
- Attach the IFC you have exported from it
- Explain the issue again on that forum post for completeness.
Please also send me an email (I have messaged you my email address) with the thread link, and I will help you debug your issue and make sure that FreeCAD authors the IFC file as expected.