pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-41185-con_alma.ps) >>/Users/jc/w/tmp/Tune-41185-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/jazz/con_alma.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-41185-con_alma.abc 1079 ABC music file with the extracted tune(s)
Tune-41185-con_alma.ps 38889 PostScript
Tune-41185-con_alma.txt 1079 Plain-text file with the extracted tune(s)
Tune-41185-get.log 4865 Log file, useful mostly for debugging
These files should be available for 24 hours.