Generated maintenance views with "Customer include: SAP part"

Dear gurus,

I have a very confusing situation here. Perhaps someone has run into it before and knows what the cause is.

I have several customizing tables and generate maintenance views for them. All ok so far.

But 2 of them for no reason I can see have additional objects generated for them:

Function group with customer include: customer part (object type FUGX)

Function group with customer include: SAP part (object type FUGS)

I dont know where they came from. Without them the maintenance view dumps.

I only noticed them at all because ChaRM transports complained about the contents of the package including these objects which it did not permit to be transfered to a "Transport of Copies" type request.

Any clues? Searching does not show up anything special nor mention where they come from..  :-(

Cheers,

Julius