pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-57397-055_Andrew_Carr.ps) >>/Users/jc/w/tmp/Tune-57397-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/NorthumbrianMinstrelsy/055_Andrew_Carr.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-57397-055_Andrew_Carr.abc 292 ABC music file with the extracted tune(s)
Tune-57397-055_Andrew_Carr.ps 32841 PostScript
Tune-57397-055_Andrew_Carr.txt 292 Plain-text file with the extracted tune(s)
Tune-57397-get.log 4671 Log file, useful mostly for debugging
These files should be available for 24 hours.