Calcos crashes in ALGNCORR step when background regions are too close to proftab data edge

[stscirij]

This is an issue for the new cenwave 800 reference files.

Traceback:
Input Reference centroid = 431.459575, row_0 = 254
Background region #2 truncated
Reguested region: 359 to 389
Using 359 to 359, with weight 0.032258
/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/trace.py:542: RuntimeWarning: Mean of empty slice.
dtype=np.float64)[goodcolumns].mean(dtype=np.float64)
/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/numpy/core/_methods.py:78: RuntimeWarning: invalid value encountered in true_divide
ret, rcount, out=ret, casting='unsafe', subok=False)
Adopted background regions for reference profile:
Rows 309 to 339, and rows 359 to 359
&&&
Error is here, profile ref file only has 359 rows so row with index 359 doesn't exist
&&&
Background = nan
Measured reference centroid = nan
Input Reference centroid = nan, row_0 = 254
Traceback (most recent call last):
File "/user/rij/anaconda3/envs/calcos_dev/bin/calcos", line 7, in
exec(compile(f.read(), file, 'exec'))
File "/user/rij/hst/cos/ssbgit/calcos/lib/calcos/calcos", line 7, in
calcos.main(sys.argv[1:])
File "/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/calcos.py", line 211, in main
burstfile=burstfile)
File "/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/calcos.py", line 434, in calcos
sci_status = cal.allScience()
File "/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/calcos.py", line 2850, in allScience
obs.info, obs.switches, obs.reffiles)
File "/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/calcos.py", line 2729, in basicCal
self.wavecal_info)
File "/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/timetag.py", line 317, in timetagBasicCalibration
tracemask, traceprofile, gti)
File "/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/timetag.py", line 3814, in doProfileAlignmentCorr
tracemask)
File "/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/trace.py", line 173, in doProfileAlignment
regions)
File "/user/rij/anaconda3/envs/calcos_dev/lib/python3.6/site-packages/calcos/trace.py", line 587, in getReferenceCentroid
offset = int(round(profcenter - regions['center']))
ValueError: cannot convert float NaN to integer
(calcos_dev)