Thanks, i'll look into the 'multiple views open' issue and see if it helps. Also, we are trying something new that might add to the problem....in our wall sections (a high-rise that stacks), we have started creating 2D .gdl objects of a single floor and then placing (and copying) this object in the wall section viewport. That way, if the cladding/detailing changes, we simply overwrite the .gdl object and the entire wall section is updated. Does anyone see a problem with this? Could this be the reason for the file pausing? Also, i take it from the lack of response, that using libraries on the server is not a problem....