Creating Itemsets from objects in IFC files

Im getting IFC files from different disciplines and I then want to create itemsets based on the properties of the objects in the IFC files.

I have tested this with only dgn-files and using the Dataset_GB.

But when a wall or other objects have been exported to IFC there is only a few properties available to choose from in the Item Set Search dialog.

When I look in the Items dialog I can see that the properties exist on the IFCWallStandardCase.

See screen shots below. Im using AECOsim SS6 and Navigator SS6

Do someone know how to solve this?