pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-24075-164_Come_Birds.ps) >>/Users/jc/w/tmp/Tune-24075-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EverydaySongBook/164_Come_Birds.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-24075-164_Come_Birds.abc 1064 ABC music file with the extracted tune(s)
Tune-24075-164_Come_Birds.ps 35072 PostScript
Tune-24075-164_Come_Birds.txt 1064 Plain-text file with the extracted tune(s)
Tune-24075-get.log 4553 Log file, useful mostly for debugging
These files should be available for 24 hours.