pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2660-Coilsfield_House-G-16-3.ps) >>/Users/jc/w/tmp/Tune-2660-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/air/Coilsfield_House-G-16-3.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_26607.log 137967 Log file, useful mostly for debugging
Tune-2660-Coilsfield_House-G-16-3.abc 641 ABC music file with the extracted tune(s)
Tune-2660-Coilsfield_House-G-16-3.ps 36967 PostScript
Tune-2660-Coilsfield_House-G-16-3.txt 641 Plain-text file with the extracted tune(s)
Tune-2660-get.log 4564 Log file, useful mostly for debugging
Tune-26607-get.log 2361 Log file, useful mostly for debugging
Tune-26608-get.log 4125 Log file, useful mostly for debugging
These files should be available for 24 hours.