Why am i getting such an error and what does it mean?----> [Connection Error] Cannot connect to null port handle

UVM
8

In reply to chaitanyh shirsh:

ELAB2_0036 Unresolved hierarchical reference to “driver.analysis_scoreboard_01.connect./0/” from module “encrypt_agent” (module not found).
what can be the reason of this error?
if my code of agent is as follows:-



class encrypt_agent extends uvm_agent;
  encrypt_sequencer sequencer;
  encrypt_driver driver;
  encrypt_monitor monitor;
  aes_subscriber predictor;  
   
  `uvm_component_utils(encrypt_agent);
     
   uvm_analysis_port#(encrypt_seq_item) anal_port2;   
   uvm_analysis_port#(encrypt_seq_item) analysis_scoreboard_01;   
   
  function new(string name, uvm_component parent);
    super.new(name, parent);
  endfunction
  
  function void build_phase(uvm_phase phase);
    super.build_phase(phase);
    
      anal_port2 = new("anal_port2", this);
	  analysis_scoreboard_01 = new("analysis_scoreboard_01",this);
      sequencer = encrypt_sequencer::type_id::create("sequencer", this);
      driver = encrypt_driver::type_id::create("driver", this);
      monitor = encrypt_monitor::type_id::create("monitor", this);
	  predictor = aes_subscriber::type_id::create("predictor",this);
  endfunction
    
  function void connect_phase(uvm_phase phase);
    super.connect_phase(phase);  
    if(is_active == UVM_ACTIVE)
      driver.seq_item_port.connect(sequencer.seq_item_export);
      monitor.anal_port1.connect(anal_port2);
	  //driver.analysis_scoreboard.connect(predictor.port_01);
	  driver.analysis_scoreboard_01.connect(predictor.analysis_export);
	  $display("connection of the agent to the subscriber");
      endfunction
endclass