pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-67775-1059_Six_and_Sevens.ps) >>/Users/jc/w/tmp/Tune-67775-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/CaledonianCountryDances/1059_Six_and_Sevens.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-67775-1059_Six_and_Sevens.abc 1536 ABC music file with the extracted tune(s)
Tune-67775-1059_Six_and_Sevens.ps 40781 PostScript
Tune-67775-1059_Six_and_Sevens.txt 1536 Plain-text file with the extracted tune(s)
Tune-67775-get.log 4839 Log file, useful mostly for debugging
These files should be available for 24 hours.