Error LNK2019 unresolved external symbol "public: int __cdec

[mohammmad]

Hi,
I added some .h and .cpp. There is no error in these files (nDarray.h and ...) but when I compile the source, I got the following error:

Severity Code Description Project File Line Suppression State
Error LNK2019 unresolved external symbol "public: int __cdecl nDarray::rank(void)const " (?rank@nDarray@@QEBAHXZ) referenced in function "public: class Matrix & __cdecl Matrix::operator=(class BJtensor const &)" (??4Matrix@@QEAAAEAV0@AEBVBJtensor@@@Z) OpenSees F:\2.5.0-original\Win64\proj\openSees\matrix.lib(Matrix.obj) 1


Can anyone help me?