WARNING:Xst:1290 and WARNING:Xst:528

Question

Please help regarding the warning and error of my program

WARNING:Xst:1290 - Hierarchical block <bjn9> is unconnected in block <sequencedetector>.
It will be removed from the design.
WARNING:Xst:528 - Multi-source in Unit <sequencedetector> on signal not replaced by logic
Sources are: sg16_Mxor_q_Result:Result, sg15_Mxor_r_Result:Result

for following program

bjn9: bjn
    port map (s12,s14,o,g9,g10,s15);

Suggest the steps for correction in VHDL code

Answer 1

Unconnected block warning

Possible solutions to remove the warning:

1. Remove the bjn9 instance.
2. Connect any of the outputs of bjn9 to something that uses them.

Multi-source warning

Possible solutions to remove the warning:

1. Remove all but one of the multiple sources.
2. Add logic to combine the sources to a single signal.