pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16486-woodenflute.ps) >>/Users/jc/w/tmp/Tune-16486-get.log 2>&1" returned status 256
http://www.lesession.co.uk/music/woodenflute.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-16486-get.log 4447 Log file, useful mostly for debugging
Tune-16486-woodenflute.abc 280 ABC music file with the extracted tune(s)
Tune-16486-woodenflute.ps 34361 PostScript
Tune-16486-woodenflute.txt 280 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.