Bug in thm_load_asi_cal.pro

[nickssl]

thm_load_asi_cal, 'atha chbg', cal_files

% Conflicting data structures: CAL_STRUC,CAL.
% Execution halted at: THM_LOAD_ASI_CAL 137 /spedas_trunk/projects/themis/ground/thm_load_asi_cal.pro
% $MAIN$

[nickssl]

Further investigation:

1. It works with version 1 of these cal files:
   thm_load_asi_cal, 'atha chbg', cal_struc,file_version_in='01'
   thm_load_asi_cal, '*', cal_struc,file_version_in='01', /all

2. But it has problems with some version 2 cal files:
   thm_load_asi_cal, '*', cal_struc, /all

In particular, it seems that the problem is with three cal files: atha, snkq, pina

The following gives an empty structure:
thm_load_asi_cal, 'pina', cal_struc

The cal files for following two stations seem to produce structures a little different from all other stations: atha, snkq