waveform dump problem using SystemVerilog

Hi ,
     I am using NcVerilog 5.6 with +sv option to enable SystemVerilog.
I am getting the following error during simulation.

***Current stack trace:
 -->[Don't Know      ] 0         't know>
 -->[Don't Know      ] 5d62b0    ncdbg_exit           + 1bdc
 -->[Don't Know      ] 3eb568    sss_tag_dbend        + 520
 -->[VPI Overhead    ] 136a3c    vpi_tag_ostart       + 191b4
 -->[VPI Overhead    ] 136afc    vpi_tag_ostart       + 19274
 -->[VPI Overhead    ] 1385a8    vpi_tag_ostart       + 1ad20
 -->[VPI Overhead    ] 156f68    vpi_tag_ostart       + 396e0
***Verilog source where error occurs:
   $recordfile(...) (PLI calltf)
        Module: TB_TST
        Instance: TB_TST
        File: ./TB_TST.v
        Line: 422
ncverilog: *E,SIMERR: Error during Simulation (status 255), exiting.

Can somebody help me.
I am using $recordfile("./filename");
                  $recordvars();
Are these PLI's not supported in SystemVerilog.