关于PDIUSBD12控制芯片源代码问题！

  我在用MeWin 仿真ZLG的USB开发的程序，当我编译时出现了下面的警告！！
*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
        SEGMENT: ?PR?GET_D12_FIRMWAREVER?D12DRIVER
    *** WARNING L15: MULTIPLE CALL TO SEGMENT
        SEGMENT: ?PR?_D12_WRITEENDPOINT?D12CI
        CALLER1: ?PR?USB_EXCEPTION?D12DRIVER
        CALLER2: ?C_C51STARTUP
    *** WARNING L15: MULTIPLE CALL TO SEGMENT
        SEGMENT: ?PR?_D12_SETENDPOINTSTATUS?D12CI
        CALLER1: ?PR?USB_EXCEPTION?D12DRIVER
        CALLER2: ?C_C51STARTUP
    Program Size: data=89.0 xdata=51 code=2936
    LINK/LOCATE RUN COMPLETE.  3 WARNING(S),  0 ERROR(S)
Project[usb1]: Link failure ! 虽然时警告 但是却不能进行下一步的硬件仿真，有哪位高手能告诉我下，怎么样消除这些WARNING啊？
         急救！！