pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1841-GrandmasMandolin.ps) >>/Users/jc/w/tmp/Tune-1841-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/GrandmasMandolin.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_18413.log 68504 Log file, useful mostly for debugging
Coll_18418.log 66074 Log file, useful mostly for debugging
Tune-1841-GrandmasMandolin.abc 552 ABC music file with the extracted tune(s)
Tune-1841-GrandmasMandolin.ps 37678 PostScript
Tune-1841-GrandmasMandolin.txt 552 Plain-text file with the extracted tune(s)
Tune-1841-get.log 4274 Log file, useful mostly for debugging
Tune-18412-get.log 4751 Log file, useful mostly for debugging
These files should be available for 24 hours.