I am doing uvm adder varification but i have got some error

In reply to chr_sue:

thanks for reply
now this error is comming
Fatal: (vsim-160) /tools/questa-/2020.3/questasim/uvm-1.1d/…/verilog_src/uvm-1.1d/src/dpi/uvm_svcmd_dpi.svh(27): Null foreign function pointer encountered when calling ‘uvm_dpi_get_next_arg_c’

Time: 0 ns Iteration: 0 Process: /uvm_pkg/#INITIAL#619 File: /tools/questa-/2020.3/questasim/uvm-1.1d/…/verilog_src/uvm-1.1d/src/dpi/uvm_svcmd_dpi.svh

Fatal error in Module uvm_pkg at /tools/questa-/2020.3/questasim/uvm-1.1d/…/verilog_src/uvm-1.1d/src/dpi/uvm_svcmd_dpi.svh line 27

HDL call sequence:

Stopped at /tools/questa-/2020.3/questasim/uvm-1.1d/…/verilog_src/uvm-1.1d/src/dpi/uvm_svcmd_dpi.svh 27 Module uvm_pkg

called from /tools/questa-/2020.3/questasim/uvm-1.1d/…/verilog_src/uvm-1.1d/src/dpi/uvm_svcmd_dpi.svh 32 Module uvm_pkg

called from /tools/questa-/2020.3/questasim/uvm-1.1d/…/verilog_src/uvm-1.1d/src/base/uvm_cmdline_processor.svh 245 Function uvm_pkg/uvm_cmdline_processor::new

called from /tools/questa-/2020.3/questasim/uvm-1.1d/…/verilog_src/uvm-1.1d/src/base/uvm_cmdline_processor.svh 61 Function uvm_pkg/uvm_cmdline_processor::get_inst