pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-61011-m.ps) >>/Users/jc/w/tmp/Tune-61011-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/contra/m.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-61011-get.log 3690 Log file, useful mostly for debugging
Tune-61011-m.abc 191 ABC music file with the extracted tune(s)
Tune-61011-m.ps 30617 PostScript
Tune-61011-m.txt 191 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.