[bcc32 Error] typeinfo.h(154): E2367 Can't inherit RTTI class from non-RTTI base 'exception'

    [bcc32 Error] typeinfo.h(154): E2367 Can't inherit RTTI class from non-RTTI base 'exception'
  Full parser context
    HISPluginDebug.cpp(3): #include d:program files (x86)embarcaderostudio18.0includewindowsvclvcl.h
    vcl.h(10): #include d:program files (x86)embarcaderostudio18.0includewindowsvclasepch0.h
    basepch0.h(62): #include d:program files (x86)embarcaderostudio18.0includewindows tlSystem.hpp
    System.hpp(1599): #include d:program files (x86)embarcaderostudio18.0includewindows tlsysclass.h
    sysclass.h(38): #include d:program files (x86)embarcaderostudio18.0includedinkumwareiostream
    iostream(5): #include d:program files (x86)embarcaderostudio18.0includedinkumwareistream
    istream(5): #include d:program files (x86)embarcaderostudio18.0includedinkumwareostream
    ostream(5): #include d:program files (x86)embarcaderostudio18.0includedinkumwareios
    ios(5): #include d:program files (x86)embarcaderostudio18.0includedinkumwarexlocnum
    xlocnum(8): #include d:program files (x86)embarcaderostudio18.0includedinkumwarestreambuf
    streambuf(5): #include d:program files (x86)embarcaderostudio18.0includedinkumwarexiosbase
    xiosbase(4): #include d:program files (x86)embarcaderostudio18.0includedinkumwarexlocale
    xlocale(7): #include d:program files (x86)embarcaderostudio18.0includedinkumware ypeinfo
    typeinfo(8): #include d:program files (x86)embarcaderostudio18.0includewindowscrtl ypeinfo.h
    typeinfo.h(55): namespace std
    typeinfo.h(154): class bad_cast

懒得找原因了，新建工程OK了。