pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-68318-03_Lady_Harriot_Leslies_Waltz.ps) >>/Users/jc/w/tmp/Tune-68318-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1803/Bland_Weller/03_Lady_Harriot_Leslies_Waltz.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-68318-03_Lady_Harriot_Leslies_Waltz.abc 860 ABC music file with the extracted tune(s)
Tune-68318-03_Lady_Harriot_Leslies_Waltz.ps 35571 PostScript
Tune-68318-03_Lady_Harriot_Leslies_Waltz.txt 860 Plain-text file with the extracted tune(s)
Tune-68318-get.log 4890 Log file, useful mostly for debugging
These files should be available for 24 hours.