pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-67850-CLARKE.ps) >>/Users/jc/w/tmp/Tune-67850-get.log 2>&1" returned status 256
http://www.cpartington.plus.com/Links/Clarke/CLARKE(12-4-16).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
Coll_67850.log 259149 Log file, useful mostly for debugging
Tune-67850-CLARKE.abc 326 ABC music file with the extracted tune(s)
Tune-67850-CLARKE.ps 36033 PostScript
Tune-67850-CLARKE.txt 326 Plain-text file with the extracted tune(s)
Tune-67850-get.log 4329 Log file, useful mostly for debugging
These files should be available for 24 hours.