When trying to export any file to IFC it is often seen that some COBie properties are missing.
1. Navigate to the workset.cfg file of your WorkSet (where you want to export the IFC) and open it in a text editor such as Notepad++. Scroll to the bottom where you will find this section: 2. Here set the ‘IFC_WORKSET: ‘ value to ‘2’ then save the configuration file. After doing so reopen OpenBuildings Designer. Now you should find that COBie properties are exported to IFC without any issue.