请教： Full Debug时没错，Realse时有错！

[fromv]

Full Debug时，程序Build通过，运行正常。但在Realse时报错。
[Linker Error] Unresolved external '__fastcall Idglobal::IntToBin(unsigned int)' referenced from D:\WORK\BCB\WHTMAINFORM.OBJ

只保留*.cpp,*.h,*.dfm,删除其它文件后Build仍然报错。请问该怎么办？