Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/JamesOswald/CPC/20281_Fairly_shot_on_her.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-975-all.ps) >>/Users/jc/w/tmp/Tune-975-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JamesOswald/CPC/20281_Fairly_shot_on_her.abc/all

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-975-all.abc 176 ABC music file with the extracted tune(s)
Tune-975-all.ps 6 PostScript
Tune-975-all.txt 176 Plain-text file with the extracted tune(s)
Tune-975-get.log 4072 Log file, useful mostly for debugging
Tune-97507-all.abc 158 ABC music file with the extracted tune(s)
Tune-97507-all.pdf 2217 Portable Data Format
Tune-97507-all.ps 6 PostScript
Tune-97507-all.txt 158 Plain-text file with the extracted tune(s)
Tune-97507-get.log 4857 Log file, useful mostly for debugging
Tune-97518-all.abc 158 ABC music file with the extracted tune(s)
Tune-97518-all.pdf 2217 Portable Data Format
Tune-97518-all.ps 6 PostScript
Tune-97518-all.txt 158 Plain-text file with the extracted tune(s)
Tune-97518-get.log 4857 Log file, useful mostly for debugging
Tune-97536-all.abc 168 ABC music file with the extracted tune(s)
Tune-97536-all.ps 6 PostScript
Tune-97536-all.txt 168 Plain-text file with the extracted tune(s)
Tune-97536-get.log 4085 Log file, useful mostly for debugging
Tune-97566-all.abc 177 ABC music file with the extracted tune(s)
Tune-97566-all.ps 6 PostScript
Tune-97566-all.txt 177 Plain-text file with the extracted tune(s)
Tune-97566-get.log 4022 Log file, useful mostly for debugging
Tune-97582-all.abc 178 ABC music file with the extracted tune(s)
Tune-97582-all.ps 6 PostScript
Tune-97582-all.txt 178 Plain-text file with the extracted tune(s)
Tune-97582-get.log 4030 Log file, useful mostly for debugging
These files should be available for 24 hours.