edf2nx with config file: raise error with default configuraiton file

gpu3-01:inhouse3/comm_22may/pauline % nxtomomill edf2nx ESM_ft_342nm_1_ ESM_ft_342nm_1_.nx --config conf.cfg
ERROR:nxtomomill.io.config.edfconfig:No UNIT_SECTION section found
ERROR:nxtomomill.io.config.edfconfig:No SOURCE_SECTION section found
ERROR:nxtomomill.io.config.edfconfig:No DETECTOR_SECTION section found