pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-18977-10811_SYLVANUS_HORNPIPE.ps) >>/Users/jc/w/tmp/Tune-18977-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/10811_SYLVANUS_HORNPIPE.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_18977.log 155703 Log file, useful mostly for debugging
Tune-18977-10811_SYLVANUS_HORNPIPE.abc 761 ABC music file with the extracted tune(s)
Tune-18977-10811_SYLVANUS_HORNPIPE.ps 40099 PostScript
Tune-18977-10811_SYLVANUS_HORNPIPE.txt 761 Plain-text file with the extracted tune(s)
Tune-18977-get.log 4755 Log file, useful mostly for debugging
These files should be available for 24 hours.