Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/oneills/1850/F/0732-0758_mh.abc"
X:753 not found in http://john-chambers.us/~jc/music/book/oneills/1850/F/0732-0758_mh.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2313-0732-0758_mh.ps) >>/Users/jc/w/tmp/Tune-2313-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/oneills/1850/F/0732-0758_mh.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-2313-0732-0758_mh.abc 0 ABC music file with the extracted tune(s)
Tune-2313-0732-0758_mh.ps 6 PostScript
Tune-2313-0732-0758_mh.txt 0 Plain-text file with the extracted tune(s)
Tune-2313-get.log 4427 Log file, useful mostly for debugging
These files should be available for 24 hours.