I’m being lazy tonight because of the election and spending all day at the AIA Minnesota Convention. Here’s the info from the link below:

This hotfix has been published for solving IFC issues occurred after ArchiCAD 15 Hotfix 4 (Build 3898). Due to technical reasons this package does not only update the IFC add-on in the existing ArchiCAD package but all ArchiCAD components and fixes several errors found in those components as well. As a result if you update your ArchiCAD and you also want to use this ArchiCAD for Teamwork, you need to patch BIM Server and BIM Server Manager too. The hotfix applies to all components: ArchiCAD, BIM Server, BIM Server Manager, EcoDesigner, BIM Explorer, MEP Modeler and all other GRAPHISOFT-distributed Add-Ons and Goodies. It applies to all (Commercial, Educational and Trial) license types.

Remember to update everyone using Teamwork 2 (including the BIM Server) at the same time. Oh and this Hotfix does also fix some non-IFC issues, so if you’re still on 15, you’ll want to update.

Here’s the link to the complete notes and download.