pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8542-20180912-Colin_Hume_tunes.ps) >>/Users/jc/w/tmp/Tune-8542-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/Colin_Hume/20180912-Colin_Hume_tunes.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_85429.log 316931 Log file, useful mostly for debugging
Form_85421.log 739 Log file, useful mostly for debugging
Form_85428.log 775 Log file, useful mostly for debugging
Tune-8542-20180912-Colin_Hume_tunes.abc 434 ABC music file with the extracted tune(s)
Tune-8542-20180912-Colin_Hume_tunes.ps 34338 PostScript
Tune-8542-20180912-Colin_Hume_tunes.txt 434 Plain-text file with the extracted tune(s)
Tune-8542-get.log 9879 Log file, useful mostly for debugging
Tune-85420-get.log 4468 Log file, useful mostly for debugging
Tune-85421-get.log 2945 Log file, useful mostly for debugging
Tune-85422-get.log 6142 Log file, useful mostly for debugging
Tune-85424-TeddyBearsPicnic_Em.abc 913 ABC music file with the extracted tune(s)
Tune-85424-TeddyBearsPicnic_Em.txt 913 Plain-text file with the extracted tune(s)
Tune-85424-get.log 3122 Log file, useful mostly for debugging
Tune-85425-get.log 8994 Log file, useful mostly for debugging
These files should be available for 24 hours.