pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-54793-20701_Thunder_Hornpipe.ps) >>/Users/jc/w/tmp/Tune-54793-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP2/20701_Thunder_Hornpipe.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-54793-20701_Thunder_Hornpipe.abc 1258 ABC music file with the extracted tune(s)
Tune-54793-20701_Thunder_Hornpipe.ps 43577 PostScript
Tune-54793-20701_Thunder_Hornpipe.txt 1258 Plain-text file with the extracted tune(s)
Tune-54793-get.log 4893 Log file, useful mostly for debugging
These files should be available for 24 hours.