| badZclipLevels | error |
| | The maximum permitted image brightness is less than the minimum.
|
| badPGPLOTdevice | error |
| | Invalid device for PGPLOT
|
| badImageTransferId | error |
| | Invalid zscaletype value
|
| badImageStyle | error |
| | Unrecognised value of imagestyle.
|
| badZclipValues | error |
| | withzclip=yes and zhistolo  zhistohi.
|
| badNcutSortStyle | error |
| | Unrecognised value of ncutsortstyle.
|
| badRadiusStyle | error |
| | Unrecognised value of radiusstyle.
|
| badLabelStyle | error |
| | Unrecognised value of labelstyle.
|
| imageAllZero | error |
| | trimborder=yes but whole image is blank.
|
| sizelessImageArray | error |
| | The image is of zero size.
|
| badXclipValues | error |
| | withxyclip=yes and xfraclo xfrachi.
|
| badYclipValues | error |
| | withxyclip=yes and yfraclo yfrachi.
|
| badContourStyle | error |
| | Unrecognised value of contourstyle.
|
| badImageStyle | error |
| | Unrecognised value of imagestyle.
|
| badWcsType | error |
| | The WCS system is not RA—TAN/DEC–TAN. No other coordinate system is yet recognized by the task.
|
| badWcsWorldUnit | error |
| | The WCS world unit is not degrees. No other unit is yet recognized by the task.
|
| badGridStyle | error |
| | Unrecognised value of gridstyle.
|
| pgcrvlErr | error |
| | Error in drawing the RA/Dec grid. Rerun with gridstyle=none.
|
| noSourcesSelected | error |
| | No sources passed the filtering expression.
|
| allRadiusRowsNull | error |
| | All the rows specified by radiusexpression are null-valued.
|
| badInstrum | error |
| | Unrecognised value of instrumentId obtained from the image dataset.
|
| badLabelColumnDataType | error |
| | The data type of the result of labelexpression has not been recognized.
|
| badLabelsStyle | error |
| | Unrecognised value of labelstyle.
|
| badColourMap | error |
| | Unrecognised (zero) value of colourmap.
|
| badBrightnessRange | warning |
| | The minimum and maximum image brightness truncation levels are the same.
corrective action: Contours are not plotted if they were requested.
|
| contourSeparationTooLarge | warning |
| | The contour separation specified by contourseparation results in  1 contour.
corrective action: None.
|
| sourcesOutside | warning |
| | There are source positions outside the displayed image area. No cause for alarm.
corrective action: None.
|
