Hi @elad,
Have you tried the following: (For testing purposes):
- "Save As" the Revit Project with a suffix of your choice e.g. - Revit-Project-TEST
- Purge the Revit Project (Manage Tab >> Settings >> Purge Unused in the Ribbon) - This will reduce the file size.
- Check for Warnings (Manage Tab >> Inquiry (top-right of the ribbon) >> Warnings)
- Lastly, completely unlink/remove the images and also remove any unused linked files.
Firstly, do step [1], then export and import, if it doesn't work, do the next step and so on. This way, you could try and fish out where the problem might be. You can obviously also try all of the steps at once. If you resolve the issue with one of the steps in the -TEST file, simply repeat the steps in your main model and continue from there.
Now Export and Import the File. You could maybe even try and export it as a DXF file? DXF is also supported by Design Review.

I hope this helps!
Rudi Roux
MSc | Digital Engineering Manager
LinkedIn
Revit Mechanical & Electrical Systems 2018 Certified Professional | Revit MEP & Architecture 2015 Certified Professional
AutoCAD 2015 Certified Professional | Autodesk Building Performance Analysis (BPA) Certificate
If this post resolved your issue, kindly Accept as the Solution below. Kudos are always welcome ⇘