pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-50866-008_la_Rosetta.ps) >>/Users/jc/w/tmp/Tune-50866-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Stewart/SCAJMR/008_la_Rosetta.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-50866-008_la_Rosetta.abc 811 ABC music file with the extracted tune(s)
Tune-50866-008_la_Rosetta.ps 38267 PostScript
Tune-50866-008_la_Rosetta.txt 811 Plain-text file with the extracted tune(s)
Tune-50866-get.log 8537 Log file, useful mostly for debugging
These files should be available for 24 hours.