Why do I get the following error?
*** ERROR: aspect histogram acisf00459_ah4.fits[ASPHIST] contains no rows
This error is from mkgarf and occurs when a chip wasn't on for the observation. The fullgarf script attempts to calculate gARFs for ACIS chips S0-S3 if the order is less than zero or chips S3-S5 if the order is greater than zero, regardless of whether or not the chip was actually used in the observation. This error can be ignored, as it does not adversely affect the script output.