Comment 2 for bug 1419146

in mentor you edit a separate bus file containing all the project´s buses and its members.

so you actually get suggestions on members when you connect to the bus, of course you need to name it ta a valid bus name existing in your file first
bus members can be arbitrary names and arrays net[0:10]
also signed bus members net[0:10]+ , net[0:10]- this will form diff-pair automatically in constraints editor.

i am up to some major head-ache now on to how to avoid this bug that will make schematics way more complex and logical

being logical is the point with schematics