pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-79678-Now_Is_The_Month_Of_Maying.ps) >>/Users/jc/w/tmp/Tune-79678-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/src/jcabc2ps-20100402/abc/Now_Is_The_Month_Of_Maying.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-79678-Now_Is_The_Month_Of_Maying.abc 1138 ABC music file with the extracted tune(s)
Tune-79678-Now_Is_The_Month_Of_Maying.ps 43567 PostScript
Tune-79678-Now_Is_The_Month_Of_Maying.txt 1138 Plain-text file with the extracted tune(s)
Tune-79678-get.log 4730 Log file, useful mostly for debugging
These files should be available for 24 hours.