Modelsim Error: No objects found matching '/test/*'

Question

I am a newbie to modelsim and Verilog. I designed a DFF(D flip flop module) and a test bench for testing it. But I can't get why modelsim give me this error:

No objects found matching '/test/*'

test bench code:

  // Testbench
  module test;

    reg clk;
    reg reset;
    reg d;
    wire q;
    wire qb;

    // Instantiate design under test
    dff DFF(.clk(clk), .reset(reset),
            .d(d), .q(q), .qb(qb));

    initial begin
      // Dump waves
      $dumpfile("dump.vcd");
      $dumpvars(1);

      $display("Reset flop.");
      clk = 0;
      reset = 1;
      d = 1'bx;
      display;

      $display("Release reset.");
      d = 1;
      reset = 0;
      display;

      $display("Toggle clk.");
      clk = 1;
      display;
    end

    task display;
      #1 $display("d:%0h, q:%0h, qb:%0h",
        d, q, qb);
    endtask
    endmoudle

DFF code:

// Design
// D flip-flop
module dff (clk, reset,
  d, q, qb);
  input      clk;
  input      reset;
  input      d;
  output     q;
  output     qb;

  reg        q;

  assign qb = ~q;

  always @(posedge clk or posedge reset)
  begin
    if (reset) begin
      // Asynchronous reset when reset goes high
      q <= 1'b0;
    end else begin
      // Assign D to Q on positive clock edge
      q <= d;
    end
  end
endmodule

for simulating I first compile both files then simulate the test bench. after this, I go to the wave windows and try to put the test into the wave but at this point I get the error I have mentioned at the first.

To be honest, this doesn't sound like a programming problem. What command are you giving to Modelsim to cause this error? — Matthew Taylor
I'm voting to close this question as off-topic because this question doesn't appear to be about programming. — Matthew Taylor

Unknown Unknown · Accepted Answer · 2019-03-14T19:12:29

The problem was with the optimization. I simulate this code with:

vsim -novopt destination

and everything went fine.

Modelsim Error: No objects found matching '/test/*'

2 Answers