Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21463_the_Brechin_Lilt.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5551-all.ps) >>/Users/jc/w/tmp/Tune-5551-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21463_the_Brechin_Lilt.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
Coll_55510.log 144094 Log file, useful mostly for debugging
Coll_55512.log 264661 Log file, useful mostly for debugging
Coll_55513.log 2287285 Log file, useful mostly for debugging
Coll_55515.log 266066 Log file, useful mostly for debugging
Form_55514.log 825 Log file, useful mostly for debugging
Sess-55512.log 211 Log file, useful mostly for debugging
Tune-5551-21171_.abc 50 ABC music file with the extracted tune(s)
Tune-5551-21171_.ps 6 PostScript
Tune-5551-21171_.txt 50 Plain-text file with the extracted tune(s)
Tune-5551-all.abc 174 ABC music file with the extracted tune(s)
Tune-5551-all.ps 6 PostScript
Tune-5551-all.txt 174 Plain-text file with the extracted tune(s)
Tune-5551-get.log 7902 Log file, useful mostly for debugging
Tune-55511-Northern_Road-D-32-3.abc 531 ABC music file with the extracted tune(s)
Tune-55511-Northern_Road-D-32-3.ps 34755 PostScript
Tune-55511-Northern_Road-D-32-3.txt 531 Plain-text file with the extracted tune(s)
Tune-55511-get.log 5092 Log file, useful mostly for debugging
Tune-55515-32562_RAINBOW_OR_MIDNIGHT_SCHOTTISCHE.abc 764 ABC music file with the extracted tune(s)
Tune-55515-32562_RAINBOW_OR_MIDNIGHT_SCHOTTISCHE.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-55515-32562_RAINBOW_OR_MIDNIGHT_SCHOTTISCHE.ps 39159 PostScript
Tune-55515-32562_RAINBOW_OR_MIDNIGHT_SCHOTTISCHE.txt 764 Plain-text file with the extracted tune(s)
Tune-55515-get.log 6245 Log file, useful mostly for debugging
Tune-55517-get.log 3468 Log file, useful mostly for debugging
These files should be available for 24 hours.