pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-29214-AmazingGraceUp3rd.abc -F fmt/pdf_60.fmt +s 0.60 +maxs 2000 )>/Users/jc/w/tmp/Tune-29214-AmazingGraceUp3rd.ps 2>>/Users/jc/w/tmp/Tune-29214-get.log" returned status 34304.
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-29214-AmazingGraceUp3rd.ps) >>/Users/jc/w/tmp/Tune-29214-get.log 2>&1" returned status 256
http://www.flutetree.org/songbook/contemporary/AmazingGraceUp3rd.html

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Form_29214.log 729 Log file, useful mostly for debugging
Tune-29214-AmazingGraceUp3rd.abc 1267 ABC music file with the extracted tune(s)
Tune-29214-AmazingGraceUp3rd.ps 0 PostScript
Tune-29214-AmazingGraceUp3rd.txt 1267 Plain-text file with the extracted tune(s)
Tune-29214-get.log 6534 Log file, useful mostly for debugging
These files should be available for 24 hours.