Virtual interface resolution cannot find a matching instance

wide_road

win7modelsim10.2c
system verilog + uvm

文件 my_driver.sv
class my_driver extends uvm_driver
   my_if2 drv_if;
   ...
endclass


文件 top_tb.sv
my_if input_if(clk, rst);
initial  uvm_config_db#(virtual my_if)::set(null,"uvm_test_top","vif",input_if);  
...

在modelsim中运行，会报错： Virtual interface resolution cannot find a matching instance for 'virtual my_if2'.

解决方法：
文件 my_driver.sv
class my_driver extends uvm_driver
   把 my_if2 drv_if;  改为my_if drv_if;
   ...
endclass