pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-14996-frk1.ps) >>/Users/jc/w/tmp/Tune-14996-get.log 2>&1" returned status 256
http://www.argonet.co.uk/users/gatherer/scottish/mfabc/frk1.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-14996-frk1.abc 273 ABC music file with the extracted tune(s)
Tune-14996-frk1.ps 35193 PostScript
Tune-14996-frk1.txt 273 Plain-text file with the extracted tune(s)
Tune-14996-get.log 4315 Log file, useful mostly for debugging
These files should be available for 24 hours.