How to correct the following error reported in QuestaSim?

[qinhailiang]

When I simulated the uvm_ref_flow_1.02‘s uart_subsystem by QuestaSim's vsim, it reports error as following:

# ** Error: (vsim-8322) ../../../../../uvm_ref_flow_1.02/soc_verification_lib/interface_uvc_lib/uart/uart_monitor.sv(66): Covergroup instance option name collision. Duplicate name: 'uart_trans_frame_cg'. <Also see ../../../../../uvm_ref_flow_1.02/soc_verification_lib/interface_uvc_lib/uart/uart_monitor.sv(66)>

a bit of source codes is copied here:

66 covergroup uart_trans_frame_cg;

67 NUM_STOP_BITS : coverpoint cfg.nbstop {

68 bins ONE = {0};

69 bins TWO = {1};

70 }

71 DATA_LENGTH : coverpoint cfg.char_length {

72 bins EIGHT = {0,1};

73 bins SEVEN = {2};

74 bins SIX = {3};

75 }

76 PARITY_MODE : coverpoint cfg.parity_mode {

77 bins EVEN = {0};

78 bins ODD = {1};

79 bins SPACE = {2};

80 bins MARK = {3};

81 }

82 PARITY_ERROR: coverpoint cur_frame.error_bits[1]

83 {

84 bins good = { 0 };

85 bins bad = { 1 };

86 }

87

88 DATA_LENGTH_x_PARITY_MODE: cross DATA_LENGTH, PARITY_MODE;

89 PARITY_ERROR_x_PARITY_MODE: cross PARITY_ERROR, PARITY_MODE;

90

91 endgroup