Warning 016: Net {net1} is terminated more than once - the net is terminated to termination reference net(s): {nets}

Net net1 is terminated more than once - the net is terminated to termination reference net(s): nets

A net should only be terminated to at most one termination reference voltage and the termination should occur at a single location. Terminating to multiple reference voltages or in multiple locations is likely to be a setup or design error.