Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/JamesOswald/CPC/12052_Strily_Vale.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8297-all.ps) >>/Users/jc/w/tmp/Tune-8297-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JamesOswald/CPC/12052_Strily_Vale.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
Form_82977.log 986 Log file, useful mostly for debugging
Tune-8297-all.abc 169 ABC music file with the extracted tune(s)
Tune-8297-all.ps 6 PostScript
Tune-8297-all.txt 169 Plain-text file with the extracted tune(s)
Tune-8297-get.log 4047 Log file, useful mostly for debugging
Tune-82971-111_Cromlets_Lilt.abc 1258 ABC music file with the extracted tune(s)
Tune-82971-111_Cromlets_Lilt.ps 39332 PostScript
Tune-82971-111_Cromlets_Lilt.txt 1258 Plain-text file with the extracted tune(s)
Tune-82971-get.log 4587 Log file, useful mostly for debugging
Tune-82976-Soldering_Iron.abc 461 ABC music file with the extracted tune(s)
Tune-82976-Soldering_Iron.ps 35597 PostScript
Tune-82976-Soldering_Iron.txt 461 Plain-text file with the extracted tune(s)
Tune-82976-get.log 4737 Log file, useful mostly for debugging
These files should be available for 24 hours.