Export StormCAD V8i to PowerCivil V8i Drainage - Missing Catalog References

I have a StormCAD network which I am trying to export into PowerCivil, however I get the following error message:

" Project cannot export to drainage file.  The project must contain all catalog references for catch basins."

How do I rectify this?

I am using Bentley PowerCivil V8i (SELECTseries 2) - Version 08.11.07.565

 

John