Hello, Untill now I haven't used the internal BOM representation a lot. Now I'm starting to use it I found a irregularity. I made a BOM. Saved the drawing. Doing a revision. Adding a custom propertie (Material_uk). Add a collumn to the BOM where I want this new property to show up. But I cant select the property while it is not in the drop down list. Well I created a new BOM. Added a collumn to this one and there is the new created property to select. Isn't that bizar?? Johnny