back bias and conf cpp files to c7d614f4daeb615ec7e872ee37458237d4f59c20 commit in order to remove a bug introduced in commits : 66279abfaf41690b6b69ace951bab8b3eaed3528 , 270fd41958bced2d61ddfbdaf9812c429da3bc30 , 5bdbf526e82f72a84d3e5c0d8e2c718b97e1f04b.