pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78156-AtTheFair.ps) >>/Users/jc/w/tmp/Tune-78156-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/Scotland/reel/AtTheFair.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Coll_78156.log 25315 Log file, useful mostly for debugging
Tune-78156-AtTheFair.abc 551 ABC music file with the extracted tune(s)
Tune-78156-AtTheFair.ps 35552 PostScript
Tune-78156-AtTheFair.txt 551 Plain-text file with the extracted tune(s)
Tune-78156-get.log 4390 Log file, useful mostly for debugging
These files should be available for 24 hours.