Error-[NOA] Null object access

In reply to Rogers:
Thanks, I have seen it now.
What still is missing is a couple of packages:
import uvm_pkg::;
import uvd_reg_pkg::
;
import uvd_lcm_pkg::;
import uvd_scm_pkg::
;
import vcn_mdm_pkg::;
import uvd_sre_pkg::
;
import uvd_sdb_avail_pkg::*;
I’m not sure where they are coming from.