Error message : can not find the member in the class

UVM
3

In reply to dave_59:

In reply to peter:
Your problem is you extended uvm_driver without specifying a parameter (mem_seq_item) for REQ.

Thanks Dave, i fixed the code. it worked! But , addr ,wr_en, rd_en, wdata ,rdata are unknown,
i used req.randomize() in body task. why the addr,wr_en, rd_en, wdata ,rdata can not be randomized?
Here is new driver code


 `define DRIV_IF pointer_to_interface.DRIVER.driver_cb
class mem_driver extends uvm_driver #(mem_seq_item);
   `uvm_component_utils(mem_driver);

 virtual mem_if pointer_to_interface;
   
 function new (string name, uvm_component parent);
      super.new(name,parent);

 endfunction : new

 virtual function void build_phase(uvm_phase phase);
    super.build_phase(phase);
    
	if(!uvm_config_db #(virtual mem_if)::get(null, "*","pointer_to_interface", pointer_to_interface))
        $fatal("Failed to get BFM");
		
 endfunction : build_phase
   

 task run_phase(uvm_phase phase);

      phase.raise_objection(this);
    forever begin
        seq_item_port.get_next_item(req);
      drive();
        seq_item_port.item_done();
    end

      phase.drop_objection(this);
 endtask : run_phase

   
  virtual task drive();
    `DRIV_IF.wr_en <= 0;
    `DRIV_IF.rd_en <= 0;
    @(posedge pointer_to_interface.DRIVER.clk);
        `DRIV_IF.addr <= req.addr;
      if(req.wr_en) begin
        `DRIV_IF.wr_en <= req.wr_en;
        `DRIV_IF.wdata <= req.wdata;

    @(posedge pointer_to_interface.DRIVER.clk);
      //end
    if(req.rd_en) begin
        `DRIV_IF.rd_en <= req.rd_en;
    @(posedge pointer_to_interface.DRIVER.clk);
       `DRIV_IF.rd_en <= 0;
    @(posedge pointer_to_interface.DRIVER.clk);
        req.rdata = `DRIV_IF.rdata;
      end   
  endtask : drive  
endclass