I have a static model, 2 Reservoirs as source points at 127' head (55 psi). Largest line size is 12". All junction node elevations set to 0. Billing data mapped to junction nodes as demands. No other control items. Fire Flow shows at some junctions up to 17,000 gpm available. Each source point has a 600 gpm pump, but when I put the pumps in,(600 gpm with 127' head single design point.), software cannot calculate fire flow solution. I get a 4002 error, disconnected junction added to selection set. but nothing shows. I just need a simple static fire flow output that reflects the capacity of the system, (ie. 2 600 gpm pumps at each source point.) Any thoughts?