There are currently no known bugs.
Bugs fixed in CIAO 4.13
The following is a list of bugs that were fixed in the CIAO 4.13 software release.
Incorrect error message when using method=trans with fewer than 3 sources.
With method=trans (translation only), wcs_match only needs to have 1 matching source. The tool works correctly in this case, but at the end it reports an error message
# wcs_match (CIAO): ERROR: Must have at least 3 valid sources (calc_src_errs). # wcs_match (CIAO): ERROR: Could not calculate errors between reference and duplicate sources.
and the exit status of the tool is not equal to 0 (which generally indicates that an error has occurred).
The error message and the non-zero exist status are a bug. They are left over from the time when wcs_match only supported a rotation, scale, and translation solution. In this mode, method=rst, the tool does require at least 3 matching sources.
Users can simply ignore this error message and the non-zero exit status. The output file that is created is correct.