OpenBuildings IFC export error "No IFC File specified"

Hi

when I try to export to IFC I get this error message "No IFC File specified" and the IFC cannot be created.

I am working within ProjectWise and have a managed workspace and its when I am working in ProjectWise I get this error. It used to work fine but it may have stopped working since I installed an OpenBuildings update some time ago.

If I try to create an IFC outside of ProjectWise it works fine, so I am assuming that the managed workspace stored in ProjectWise needs to be updated. 

Can anyone help with what config files/templates are used to create IFCs, and what part of the managed workspace needs to be updated?

Thanks

Rich