那迁移到64位上出现下面这些错误时怎么回事呢？
2>CompassDataManager.obj : error LNK2019: unresolved external symbol "public: static class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > __cdecl CUMRIOUtil::GetAllCompassDataGivenType(class IUMRComponent *,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?GetAllCompassDataGivenType@CUMRIOUtil@@SA?AV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@PEAVIUMRComponent@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@3@@Z) referenced in function "public: bool __cdecl CCompassDataManager::WriteNameList2TempFile(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?WriteNameList2TempFile@CCompassDataManager@@QEAA_NAEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z)
4>CATIAWriter.obj : error LNK2019: unresolved external symbol "public: static class IUMRComponent * __cdecl CUMRIOUtil::GetFEMDataBlockGivenName(class IUMRComponent *,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?GetFEMDataBlockGivenName@CUMRIOUtil@@SAPEAVIUMRComponent@@PEAV2@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) referenced in function "public: bool __cdecl CCATIAWriter::Write(void)" (?Write@CCATIAWriter@@QEAA_NXZ)
4>CATIAWriter.obj : error LNK2019: unresolved external symbol "bool __cdecl createUMRio(class IUMRio * *)" (?createUMRio@@YA_NPEAPEAVIUMRio@@@Z) referenced in function "private: bool __cdecl CCATIAWriter::InitUmrIO(void)" (?InitUmrIO@CCATIAWriter@@AEAA_NXZ)
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