pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8479-122_Barnet_Fair.ps) >>/Users/jc/w/tmp/Tune-8479-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/MichaelDabney/12Minuets12Dances/122_Barnet_Fair.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Form_84794.log 907 Log file, useful mostly for debugging
Tune-8479-122_Barnet_Fair.abc 1123 ABC music file with the extracted tune(s)
Tune-8479-122_Barnet_Fair.ps 36019 PostScript
Tune-8479-122_Barnet_Fair.txt 1123 Plain-text file with the extracted tune(s)
Tune-8479-get.log 13760 Log file, useful mostly for debugging
Tune-84791-get.log 4243 Log file, useful mostly for debugging
Tune-84792-get.log 5309 Log file, useful mostly for debugging
Tune-84793-get.log 3458 Log file, useful mostly for debugging
Tune-84794-get.log 3409 Log file, useful mostly for debugging
Tune-84796-get.log 1418 Log file, useful mostly for debugging
These files should be available for 24 hours.