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Last modified: 17 November 2020

URL: https://cxc.cfa.harvard.edu/ciao/bugs/wcs_match.html

Bugs: wcs_match


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.

Workaround:

Users can simply ignore this error message and the non-zero exit status. The output file that is created is correct.