Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/20932_Young_Collin.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1402-all.ps) >>/Users/jc/w/tmp/Tune-1402-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/20932_Young_Collin.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_14024.log 338442 Log file, useful mostly for debugging
Find_14029.log 1639 Log file, useful mostly for debugging
Tune-1402-all.abc 170 ABC music file with the extracted tune(s)
Tune-1402-all.ps 6 PostScript
Tune-1402-all.txt 170 Plain-text file with the extracted tune(s)
Tune-1402-get.log 4049 Log file, useful mostly for debugging
Tune-14020-get.log 11491 Log file, useful mostly for debugging
Tune-14022-get.log 17046 Log file, useful mostly for debugging
Tune-14029-10601_LADY_GEORGINA_RUSSELLS_REEL.abc 700 ABC music file with the extracted tune(s)
Tune-14029-10601_LADY_GEORGINA_RUSSELLS_REEL.pdf 14739 Portable Data Format
Tune-14029-10601_LADY_GEORGINA_RUSSELLS_REEL.ps 34838 PostScript
Tune-14029-10601_LADY_GEORGINA_RUSSELLS_REEL.txt 700 Plain-text file with the extracted tune(s)
Tune-14029-get.log 11231 Log file, useful mostly for debugging
These files should be available for 24 hours.