Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/session/SudburyAncients/_/Ash_Grove.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1876-Ash_Grove.ps) >>/Users/jc/w/tmp/Tune-1876-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/session/SudburyAncients/_/Ash_Grove.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
Form_18764.log 729 Log file, useful mostly for debugging
Form_18765.log 778 Log file, useful mostly for debugging
Tune-1876-Ash_Grove.abc 162 ABC music file with the extracted tune(s)
Tune-1876-Ash_Grove.ps 6 PostScript
Tune-1876-Ash_Grove.txt 162 Plain-text file with the extracted tune(s)
Tune-1876-get.log 4110 Log file, useful mostly for debugging
Tune-18763-get.log 2821 Log file, useful mostly for debugging
Tune-18764-get.log 4682 Log file, useful mostly for debugging
These files should be available for 24 hours.