pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-54187-waltzes.ps) >>/Users/jc/w/tmp/Tune-54187-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/rigel.csuchico.edu/waltzes.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-54187-get.log 4279 Log file, useful mostly for debugging
Tune-54187-waltzes.abc 281 ABC music file with the extracted tune(s)
Tune-54187-waltzes.ps 34067 PostScript
Tune-54187-waltzes.txt 281 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.