pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-73755-ShakeThe.ps) >>/Users/jc/w/tmp/Tune-73755-get.log 2>&1" returned status 256
http://www.lesession.co.uk/music/ShakeThe.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_73755.log 117170 Log file, useful mostly for debugging
Tune-73755-ShakeThe.abc 308 ABC music file with the extracted tune(s)
Tune-73755-ShakeThe.ps 35059 PostScript
Tune-73755-ShakeThe.txt 308 Plain-text file with the extracted tune(s)
Tune-73755-get.log 4070 Log file, useful mostly for debugging
These files should be available for 24 hours.