[phenixbb] autobuild mtz file

Hi there i run autobuild in phenix and have my model and mtz file. when i open my mtz file in coot using the option open mtz, a window pops " column label assignment" How can i convert this mtz file that can open in coot which has both 2fo-fc as well as fo-fc maps. -- INTEKHAB ALAM LABORATORY OF STRUCTURAL BIOINFORMATICS KOREA UNIVERSITY, SEOUL