pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-15630-493_Speed_the_Plough.ps) >>/Users/jc/w/tmp/Tune-15630-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1803/Preston/493_Speed_the_Plough.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_15630.log 149899 Log file, useful mostly for debugging
Tune-15630-493_Speed_the_Plough.abc 923 ABC music file with the extracted tune(s)
Tune-15630-493_Speed_the_Plough.ps 38374 PostScript
Tune-15630-493_Speed_the_Plough.txt 923 Plain-text file with the extracted tune(s)
Tune-15630-get.log 4714 Log file, useful mostly for debugging
These files should be available for 24 hours.