pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-34781-LEMcCulloughTunes201404.ps) >>/Users/jc/w/tmp/Tune-34781-get.log 2>&1" returned status 256
http://www.lesession.co.uk/music/LEMcCulloughTunes201404.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-34781-LEMcCulloughTunes201404.abc 259 ABC music file with the extracted tune(s)
Tune-34781-LEMcCulloughTunes201404.ps 34829 PostScript
Tune-34781-LEMcCulloughTunes201404.txt 259 Plain-text file with the extracted tune(s)
Tune-34781-get.log 4485 Log file, useful mostly for debugging
These files should be available for 24 hours.