Porting from KPIT toolchain to Renesas RXC toolchain

I am trying to converte my project from a KPIT Toolchain to RXC toolchain, what I have done up till now is that I have generated the r_cg files using my previous settings on the KPIT Toolchain and then I imported the different header and application layer files I am working on.

It shows me the error

E0562300:Dublicate symbol in an obj file.

Any idea what this means and how I could go about solving it?

Thanks.