pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-82699-CLARKE.ps) >>/Users/jc/w/tmp/Tune-82699-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
Tune-82699-CLARKE.abc 520 ABC music file with the extracted tune(s)
Tune-82699-CLARKE.ps 35152 PostScript
Tune-82699-CLARKE.txt 520 Plain-text file with the extracted tune(s)
Tune-82699-get.log 21941 Log file, useful mostly for debugging
These files should be available for 24 hours.