Hi has anyone come across this problem.

I have a chassis plate assembly which is configured in SW Electrical I then opened the 3D assembly fro within SW Electrical and all is fine there is association with the components within SW Assembly. After a period of time of updating things closing the project etc. When opening the assembly the SW Electrical manger does not appear in the Feature Tree???

this has happened on a number of occassions anyone have any ideas how to make this work again on this assembly