| InputIdenticaltoOutput | error |
| | The input and output files are the same file. Use the 'amendinput' if you really want to amend the input source list. |
| VitalColumnMissing | error |
| | One of the columns such as RA or DEC does not exist and as such cannot be copied to the corresponding _CORR column. |
| AttributeMissing | error |
| | An attribute needed for the evaluation is missing from the input. Maybe eposcorr has not been run. |