pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-86278-ThompsHps.ps) >>/Users/jc/w/tmp/Tune-86278-get.log 2>&1" returned status 256
http://www.cpartington.plus.com/Links/Thompson/ThompsHps(23-1-16).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-86278-ThompsHps.abc 309 ABC music file with the extracted tune(s)
Tune-86278-ThompsHps.ps 34529 PostScript
Tune-86278-ThompsHps.txt 309 Plain-text file with the extracted tune(s)
Tune-86278-get.log 73153 Log file, useful mostly for debugging
These files should be available for 24 hours.