| badAttStyle | error |
| | The value of attstyle was not recognized. |
| badCcdStyle | error |
| | The value of ccdstyle was not recognized. |
| badGtiStyle | error |
| | The value of gtistyle was not recognized. |
| badNumCcds | error |
| | The number of elements in ccds must equal the number in chipimgsets. |
| badNumIndices | error |
| | The number of elements in indices must equal the number in chipimgsets. |
| badNumberGtiTabNames | error |
| | The number of elements in gtitablist must equal the number in chipimgsets. |
| badWeightStyle | error |
| | The value of weightstyle was not recognized. |
| duplicateCcds | error |
| | More than one CCD was found with the same combination of instrument, CCD number and indices value. |
| noWeightColumn | error |
| | You set weightstyle to `binnedset', but no WEIGHT column was found in the binned attitude set. |
| tooManyAttBins | error |
| | You set weightstyle to `none', but this can't work because there is more than one row in the binned-attitude file. |
| badIndices | error |
| | The indices do not obey the rules: the unique values in this list must enumerate the sequence of output images. |