ngdbuild : logical net no load warning

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kcinimod

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Hi, while translating the VHDL design, i've encountered the following errors, can someone explain the warnings ?

Code: 
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_0_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_0_0_S1' has no load
WARNING - ngdbuild: logical net 'pre_count_cry_0_S0_0' has no load
WARNING - ngdbuild: logical net 'pre_count_s_0_S1_31' has no load
WARNING - ngdbuild: logical net 'pre_count_s_0_COUT_31' has no load
WARNING - ngdbuild: logical net 'data_count_cry_0_S0_0' has no load
WARNING - ngdbuild: logical net 'data_count_s_0_S1_31' has no load
WARNING - ngdbuild: logical net 'data_count_s_0_COUT_31' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_0_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_2_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_2_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_4_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_4_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_6_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_6_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_8_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_8_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_1_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_1_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_3_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_3_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_5_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_5_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_7_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_7_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_9_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_9_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_11_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_11_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_13_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_13_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_15_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_15_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_17_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_17_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_19_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_19_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_21_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_21_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_23_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_23_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_25_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_25_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_27_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_27_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_29_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_29_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_30_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_30_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_1_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_1_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_3_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_3_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_5_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_5_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_7_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_7_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_9_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_9_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_11_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_11_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_13_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_13_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_15_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_15_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_17_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_17_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_19_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_19_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_21_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_21_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_23_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_23_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_25_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_25_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_27_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_27_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_29_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_29_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_30_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_30_0_S1' has no load
WARNING - ngdbuild: DRC complete with 84 warnings
 

Sure. All those signals have no load.



Which means that those signals are not connected to the input of something else further down the line. And as such the tools will optimize those away.
 


I dont see any errors here
DRC has completed too....!!!
Why bother?...
 

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