pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1941-158_Lullaby.ps) >>/Users/jc/w/tmp/Tune-1941-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EverydaySongBook/158_Lullaby.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-1941-158_Lullaby.abc 1049 ABC music file with the extracted tune(s)
Tune-1941-158_Lullaby.ps 35808 PostScript
Tune-1941-158_Lullaby.txt 1049 Plain-text file with the extracted tune(s)
Tune-1941-get.log 4451 Log file, useful mostly for debugging
Tune-19413-21001_Fall_of_Paris.abc 1081 ABC music file with the extracted tune(s)
Tune-19413-21001_Fall_of_Paris.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-19413-21001_Fall_of_Paris.ps 45946 PostScript
Tune-19413-21001_Fall_of_Paris.txt 1081 Plain-text file with the extracted tune(s)
Tune-19413-get.log 5360 Log file, useful mostly for debugging
These files should be available for 24 hours.