pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1535-waltzes.ps) >>/Users/jc/w/tmp/Tune-1535-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/galouvielle.free.fr/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
Coll_15359.log 287457 Log file, useful mostly for debugging
Form_15350.log 951 Log file, useful mostly for debugging
Form_15354.log 921 Log file, useful mostly for debugging
Form_15355.log 901 Log file, useful mostly for debugging
Tune-1535-get.log 14454 Log file, useful mostly for debugging
Tune-1535-waltzes.abc 459 ABC music file with the extracted tune(s)
Tune-1535-waltzes.ps 34761 PostScript
Tune-1535-waltzes.txt 459 Plain-text file with the extracted tune(s)
Tune-15357-get.log 6196 Log file, useful mostly for debugging
These files should be available for 24 hours.