pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7540-MissBettyBoylesReel.ps) >>/Users/jc/w/tmp/Tune-7540-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/event/20190204/MissBettyBoylesReel.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_7540.log 138572 Log file, useful mostly for debugging
Find_75407.log 1459 Log file, useful mostly for debugging
Form_75406.log 891 Log file, useful mostly for debugging
Tune-7540-MissBettyBoylesReel.abc 737 ABC music file with the extracted tune(s)
Tune-7540-MissBettyBoylesReel.ps 37253 PostScript
Tune-7540-MissBettyBoylesReel.txt 737 Plain-text file with the extracted tune(s)
Tune-7540-get.log 4641 Log file, useful mostly for debugging
Tune-75401-get.log 6357 Log file, useful mostly for debugging
Tune-75407-get.log 3694 Log file, useful mostly for debugging
These files should be available for 24 hours.