pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-72186-sett.ps) >>/Users/jc/w/tmp/Tune-72186-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP3/sett.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-72186-1800_Preston-001.svg 56849 Scalable Vector Graphics format
Tune-72186-1800_Preston-002.svg 80513 Scalable Vector Graphics format
Tune-72186-1800_Preston-003.svg 86034 Scalable Vector Graphics format
Tune-72186-1800_Preston-004.svg 77105 Scalable Vector Graphics format
Tune-72186-1800_Preston-005.svg 49855 Scalable Vector Graphics format
Tune-72186-1800_Preston.abc 19777 ABC music file with the extracted tune(s)
Tune-72186-1800_Preston.txt 19777 Plain-text file with the extracted tune(s)
Tune-72186-get.log 23309 Log file, useful mostly for debugging
Tune-72186-sett.abc 570 ABC music file with the extracted tune(s)
Tune-72186-sett.ps 30692 PostScript
Tune-72186-sett.txt 570 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.