ncverilog仿真波形

请问大神，我一个简单的testbench仿真出不了波形，怎么回事啊?多谢啦！代码如下：
//test bench for sc sdm
`timescale
1ns/1ps
module
sim_sc_sdm ();
reg
clk;
initial
begin
clk
=
1'b0;
#100000 $finish;
end
always
#5 clk=~clk;
initial
begin
$dumpfile("sdm.fsdb");
$dumpvars;
end
endmodule

仿真结果有sdm.fsdb文件，内容如下：
$date
    May 18, 2017  05:03:28
$end
$version
    TOOL:       ncsim   15.10-s010
$end
$timescale
    1 ps
$end
$enddefinitions $end
$dumpvars
$end
#100000000

仿真log文件如下：
        Loading native compiled code:     .................... Done
        Design hierarchy summary:
                                 Instances  Unique
                Modules:                 1       1
                Registers:               1       1
                Always blocks:           1       1
                Initial blocks:          2       2
                Simulation timescale:  1ps
        Writing initial simulation snapshot: worklib.sim_sc_sdm:v
Loading snapshot worklib.sim_sc_sdm:v .................... Done
ncsim> source /opt/cadence/INCISIVE151/tools/inca/files/ncsimrc
ncsim> run
ncsim: *W,DVEXACC: some objects excluded from $dumpvars due to access restrictions, use +access+r on command line for access to all objects.
            File: ../test_bench/test.v, line = 18, pos = 8
           Scope: sim_sc_sdm
            Time: 0 FS + 0
Simulation complete via $finish(1) at time 100 US + 0
../test_bench/test.v:9 #100000 $finish;
ncsim> exit
TOOL:   ncverilog       15.10-s010: Exiting on May 18, 2017 at 05:19:25 CST  (total: 00:00:00)

試試看
> ncverilog +access+rwc test.v

按照你的命令，你得到的.fsdb其实是vcd格式的波形，dump fsdb用$fsdbDumpfile();$fsdbdumpvars();

freeflower 大看得仔細
樓主的system task 用錯了