pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-56662-3164_Miss_Stewart_Robertson.ps) >>/Users/jc/w/tmp/Tune-56662-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kerr/MM3/3164_Miss_Stewart_Robertson.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_56662.log 130735 Log file, useful mostly for debugging
Tune-56662-3164_Miss_Stewart_Robertson.abc 465 ABC music file with the extracted tune(s)
Tune-56662-3164_Miss_Stewart_Robertson.ps 34334 PostScript
Tune-56662-3164_Miss_Stewart_Robertson.txt 465 Plain-text file with the extracted tune(s)
Tune-56662-get.log 12260 Log file, useful mostly for debugging
These files should be available for 24 hours.