pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-48701-30171.ps) >>/Users/jc/w/tmp/Tune-48701-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/30171=Samson_Waltz-V2.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-48701-30171.abc 1549 ABC music file with the extracted tune(s)
Tune-48701-30171.ps 39807 PostScript
Tune-48701-30171.txt 1549 Plain-text file with the extracted tune(s)
Tune-48701-get.log 5350 Log file, useful mostly for debugging
These files should be available for 24 hours.