pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-51865-x2.ps) >>/Users/jc/w/tmp/Tune-51865-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/Contra/x2.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-51865-get.log 3758 Log file, useful mostly for debugging
Tune-51865-x2.abc 153 ABC music file with the extracted tune(s)
Tune-51865-x2.ps 31033 PostScript
Tune-51865-x2.txt 153 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.