pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16001-Summer_waltzes.ps) >>/Users/jc/w/tmp/Tune-16001-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/session/Oivan_Ilo/Summer_waltzes.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-16001-Summer_waltzes.abc 2633 ABC music file with the extracted tune(s)
Tune-16001-Summer_waltzes.ps 56223 PostScript
Tune-16001-Summer_waltzes.txt 2633 Plain-text file with the extracted tune(s)
Tune-16001-get.log 8314 Log file, useful mostly for debugging
These files should be available for 24 hours.