pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5265-Installation.ps) >>/Users/jc/w/tmp/Tune-5265-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Thompson/Installation.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-5265-Installation.abc 572 ABC music file with the extracted tune(s)
Tune-5265-Installation.ps 36073 PostScript
Tune-5265-Installation.txt 572 Plain-text file with the extracted tune(s)
Tune-5265-get.log 7593 Log file, useful mostly for debugging
Tune-52657-get.log 6148 Log file, useful mostly for debugging
Tune-52658-get.log 4091 Log file, useful mostly for debugging
These files should be available for 24 hours.