pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28876-10711_CALEDONIAN_QUADRILLES_4.ps) >>/Users/jc/w/tmp/Tune-28876-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/10711_CALEDONIAN_QUADRILLES_4.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_28876.log 285736 Log file, useful mostly for debugging
Tune-28876-10711_CALEDONIAN_QUADRILLES_4.abc 792 ABC music file with the extracted tune(s)
Tune-28876-10711_CALEDONIAN_QUADRILLES_4.ps 39003 PostScript
Tune-28876-10711_CALEDONIAN_QUADRILLES_4.txt 792 Plain-text file with the extracted tune(s)
Tune-28876-get.log 10226 Log file, useful mostly for debugging
These files should be available for 24 hours.