提示信息

| 我正在尝试模拟一个测试平台。我也没有得到波形，但在提示符下得到了以下警告消息。是因为警告我的代码不模拟吗？

** Warning: (vsim-WLF-5000) WLF file currently in use: vsim.wlf
#           File in use by:   Hostname:   ProcessID: 0
#           Attempting to use alternate WLF file \"./wlftazxa4k\".
# ** Warning: (vsim-WLF-5001) Could not open WLF file: vsim.wlf
#           Using alternate file: ./wlftazxa4k
run

我也包括我的测试台，如下所示：

    module dec_tb;
    reg [63:0] FROM_IF_ID;
    reg CLK;
    wire [117:0] TO_ID_HMIC;
    integer k=0;
    inst_decode id(.from_if_id(FROM_IF_ID),.clk(CLK),.to_id_hmic(TO_ID_HMIC));

    initial 
     begin
       $monitor($time,\"clk=%b, fifid=%b, tidhm=%b\",CLK,FROM_IF_ID,TO_ID_HMIC);
       $display(\"qf\");
       CLK= 0;
       FROM_IF_ID[35:32]=4\'b1100; 
       FROM_IF_ID[63:36]=28\'b0000_10000_00100_01000_00010_0001;
     end

    always 
     begin
     #10 CLK= ~CLK;
     end
    always @(posedge CLK)
      begin
      $display (\" TO_ID_HMIC= %b\", TO_ID_HMIC);
      FROM_IF_ID[k] =~FROM_IF_ID[k]; 
      k=k+1;
      #500 $finish;
      end
    endmodule