pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-27243-NEFRX.ps) >>/Users/jc/w/tmp/Tune-27243-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/NEFR/NEFRX.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-27243-NEFRX.abc 407 ABC music file with the extracted tune(s)
Tune-27243-NEFRX.ps 36301 PostScript
Tune-27243-NEFRX.txt 407 Plain-text file with the extracted tune(s)
Tune-27243-get.log 4156 Log file, useful mostly for debugging
These files should be available for 24 hours.