pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12401-AndyRenwicksFerret.ps) >>/Users/jc/w/tmp/Tune-12401-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/irtrad-l/AndyRenwicksFerret.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-12401-AndyRenwicksFerret.abc 879 ABC music file with the extracted tune(s)
Tune-12401-AndyRenwicksFerret.ps 44842 PostScript
Tune-12401-AndyRenwicksFerret.txt 879 Plain-text file with the extracted tune(s)
Tune-12401-get.log 5014 Log file, useful mostly for debugging
These files should be available for 24 hours.