pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-26934-hamc.ps) >>/Users/jc/w/tmp/Tune-26934-get.log 2>&1" returned status 256
http://nigelgatherer.com/tunes/abc/abc2/hamc.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_26934.log 146437 Log file, useful mostly for debugging
Tune-26934-get.log 4211 Log file, useful mostly for debugging
Tune-26934-hamc.abc 311 ABC music file with the extracted tune(s)
Tune-26934-hamc.ps 34274 PostScript
Tune-26934-hamc.txt 311 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.