You are right it is about constrain, I try to solve it but not working.
it is gives below warnings. can you tell me how to remove that warnings?
WARNING:Xst:1293 - FF/Latch <dacsend_8> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_7> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_6> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_2> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_1> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_0> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_32> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_31> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_30> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_29> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_28> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_27> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_26> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_25> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_24> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_23> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_13> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_12> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_11> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_7> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_6> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_5> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_4> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_3> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_2> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_1> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_0> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_8> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_7> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_6> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_2> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_1> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacsend_0> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_32> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_31> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_30> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_29> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_28> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_27> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_26> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_25> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_24> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_23> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_13> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_12> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_11> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_7> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_6> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_5> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_4> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_3> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_2> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_1> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.
WARNING:Xst:1293 - FF/Latch <dacdata_0> has a constant value of 0 in
block <DAC>. This FF/Latch will be trimmed during the optimization
process.