This is one of the example took from;
https://verificationacademy.com/forums/ovm/settypeoverridebytype
Here is code and please tell me how to remove this error to use factory override.
////////////////CODE_BEGINS////////////////////////////
module extend();
`include “uvm_macros.svh”
import uvm_pkg::*;
class my_packet extends uvm_object;
rand bit [31:0] a;
rand bit [3:0] b;
rand bit [7:0] c;
`uvm_object_utils_begin(my_packet)
uvm_field_int(a, UVM_ALL_ON) uvm_field_int(b, UVM_ALL_ON)
`uvm_field_int(c, UVM_ALL_ON)
`uvm_object_utils_end
function new (input string name = “my_packet”, uvm_component parent = null);
super.new(name);
endfunction: new
endclass: my_packet
///////////////////////////////////////////////////////
class my_packet_test extends my_packet;
constraint c1 {a == 5;}
`uvm_object_utils(my_packet_test)
function new (input string name = “my_packet_test”, uvm_component parent = null);
super.new(name, parent);
endfunction: new
endclass: my_packet_test
/////////////////////////////////////////////////////////
class testcase extends uvm_test;
`uvm_component_utils(testcase)
my_packet pkt;
bit flag;
function new (input string name = “testcase”, uvm_component parent = null);
super.new(name, parent);
endfunction: new
virtual function void build();
super.build();
factory.set_type_override_by_type(my_packet::get_type(), my_packet_test::get_type() );
pkt = my_packet::type_id::create(“pkt”, this);
endfunction: build
virtual task run();
flag = pkt.randomize();
if (flag == 0)
begin
$display(“COULD NOT RANDOMIZE: 1”);
end
pkt.print();
flag = pkt.randomize();
if (flag == 0)
begin
$display(“COULD NOT RANDOMIZE: 2”);
end
pkt.print();
endtask: run
endclass:testcase
////////////////////////////////////////////////////////////////////////
initial begin
run_test();
end
endmodule: extend
//////////////////////CODE_ENDS////////////////////////////////////////
Command used: irun -uvm extend.sv
Error received:
VM_FATAL @ 0: reporter [NOCOMP] No components instantiated. You must either instantiate at least one component before calling run_test or use run_test to do so. To run a test using run_test, use +UVM_TESTNAME or supply the test name in the argument to run_test(). Exiting simulation