I've updated to latest git yesterday evening, and just realized that the new version of the "AWM_update.gdt" dataset has many empty column for which in the previous version valid values existed. These are:
"""
Dropping YFD: sample range contains no valid observations
Dropping HICP: sample range contains no valid observations
Dropping HEX: sample range contains no valid observations
Dropping HEG: sample range contains no valid observations
Dropping HICPSYA: sample range contains no valid observations
Dropping HEXSYA: sample range contains no valid observations
Dropping HEGSYA: sample range contains no valid observations
Dropping HEGWEI: sample range contains no valid observations
Dropping CAN_YEN: sample range contains no valid observations
Dropping NFN_YEN: sample range contains no valid observations
Dropping STN: sample range contains no valid observations
Dropping LTN: sample range contains no valid observations
Dropping COMPR: sample range contains no valid observations
Dropping POILU: sample range contains no valid observations
Dropping PCOMU: sample range contains no valid observations
Dropping YWD: sample range contains no valid observations
Dropping YWDX: sample range contains no valid observations
Dropping YWR: sample range contains no valid observations
Dropping YWRX: sample range contains no valid observations
Dropping TWGDP: sample range contains no valid observations
Dropping CAPU: sample range contains no valid observations
"""