[Linker Error] Unresolved external '__fastcall Filectrl::DirectoryExists(const System::AnsiString)' referenced from D:\PROGRAM F

为什么我把BCB设置不加运行期抱就出现错误
[Linker Error] Unresolved external '__fastcall Filectrl::DirectoryExists(const System::AnsiString)' referenced from D:\PROGRAM FILES\BORLAND\CBUILDER5\PROJECTS\PROJECT1.OBJ [Linker Error] Unresol