This simple list of steps never got beyong the bias stage.

 
 
 wheredata Y 
  setenv basedir /home/sco/HET_work/acm_nights    (in BaseDir) 
  setenv date 20180206                         (in Date) 
 acm_list $date $basedir
 acm_basic_list list.BIAS
 ds9_list_load list.BIAS
 process_acm_bias list.BIAS 5 $date

To get stats:     clip_imstat.sh d1.fits 60 710 60 710
For acm stats:    acm_simple_stats 20180114T064547.8_acm_sci_BIAS_20180114.fits
 
               Bias Info            Stacked Bias 
            -----------------    ------------------ 
             N     Mean  m.e.     Mean    sig     n 
20180114     11  1389.46 0.03    1389.64  19.23  10 
20180115     11  1382.81 0.07    1383.18  18.44  10 
20180116    224  1382.74 0.03    1382.98  17.85  81 
20180206     19  1383.59 0.04    1383.97  18.69  18  

Bias Info     = use mean stats of all bias images 
Stacked Bias  = use mean stats from final stacked images