issue about uvm_heartbeat

Hi all,

There are such codes in heartbeat class:

 virtual task run_phase(uvm_phase phase); 
    uvm_callbacks_objection cb;
    uvm_heartbeat hb;
    uvm_event e;
    uvm_component comps[$];
    if (heartbeat_window == 0) begin
      return; 
    end
    e = new("e");
    assert($cast(cb, phase.get_objection()))
    else  
      `uvm_fatal("heartbeat", run_phase objection isn't the type of uvm_callbacks_objection. You need to define UVM_USE_CALLBACKS_OBJECTION_FOR_TEST_DONE!)
    hb = new(get_full_name(), m_context, cb);
    uvm_top.find_all("*", comps, m_context);

    hb.set_mode(UVM_ANY_ACTIVE);
    hb.set_heartbeat(e, comps); 
    fork    
      forever begin
        #heartbeat_window e.trigger();
      end     
    join_none
  endtask: run_phase

The VCS always reports assertion fail even though I defined UVM_USE_CALLBACKS_OBJECTION_FOR_TEST_DONE in define.svh or in command line.

The way of defining UVM_USE_CALLBACKS_OBJECTION_FOR_TEST_DONE:

in define.svh

1. `define UVM_USE_CALLBACKS_OBJECTION_FOR_TEST_DONE // For heartbeat

in command line:

VCS =   vcs -sverilog -debug_all -picarchive -timescale=1ns/1ps \
        +acc +vpi \
        +define+UVM_OBJECT_MUST_HAVE_CONSTRUCTOR+UVM_USE_CALLBACKS_OBJECTION_FOR_TEST_DONE \

If I defined UVM_USE_CALLBACKS_OBJECTION_FOR_TEST_DONE, phase.get_objection() should return the uvm_callbacks_objection type and the assert should be successful, but it doesn't. Why?

Thanks in advance!