axbary does not work on gzipped input event files
axbary does not work on gzipped input event files, even if your CIAO installation was configured with gzip support. The resulting error will look like:
axBary: Failed to re-open output file out_axbary.fits axBary: Error exit (error 112); output file out_axbary.fits NOT deleted
where out_axbary.fits is the value of the outfile parameter.