Hi Thanks for reading this. I have a schematic (top level) design which has a data bus. This data bus has had IOB(63:0) and separate Ibuf(63:0) and OBUF(63:0) attached to an IO marker (bidirectional) and NOTHING else in the schematic. I get an error on synthesis that says: Signal is stuck at GND
WARNING:Xst:528 - Multi-source in Unit on signal
not replaced by logic Signal is stuck at GND WARNING:Xst:528 - Multi-source in Unit on signal
not replaced by logic Signal is stuck at GND WARNING:Xst:528 - Multi-source in Unit on signal
not replaced by logic Signal is stuck at GND WARNING:Xst:528 - Multi-source in Unit on signal
not replaced by logic
Signal is stuck at GND Anybody seen this error??? I am using primitives and not macros for the IOBufs Also I had created this schematic under 4.1 and foolishly upgraded to take "advantage" 5.1... the schematic synthed and routed fine under 4.1 Any Ideas??? Thanks;