When you merge the IFC files you will see a 'Settings' button.
This will allow you to choose an appropriate IFC translator.
You need to choose a translator that does not convert the geometry to objects.
You can also create your own translators with the settings you want.
Barry.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10