Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/ONeills/Rare_Small/0069_the_Cream_Pot.abc/book0"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6399-book0.ps) >>/Users/jc/w/tmp/Tune-6399-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ONeills/Rare_Small/0069_the_Cream_Pot.abc/book0

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Coll_63990.log 144175 Log file, useful mostly for debugging
Tune-6399-book0.abc 175 ABC music file with the extracted tune(s)
Tune-6399-book0.ps 6 PostScript
Tune-6399-book0.txt 175 Plain-text file with the extracted tune(s)
Tune-6399-get.log 4109 Log file, useful mostly for debugging
Tune-63990-get.log 3976 Log file, useful mostly for debugging
Tune-63991-20561_Allegro.abc 1276 ABC music file with the extracted tune(s)
Tune-63991-20561_Allegro.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-63991-20561_Allegro.ps 41557 PostScript
Tune-63991-20561_Allegro.txt 1276 Plain-text file with the extracted tune(s)
Tune-63991-get.log 5244 Log file, useful mostly for debugging
Tune-63992-get.log 7970 Log file, useful mostly for debugging
Tune-63996-get.log 8091 Log file, useful mostly for debugging
Tune-63997-agua_de_beber-001.svg 39667 Scalable Vector Graphics format
Tune-63997-agua_de_beber.abc 904 ABC music file with the extracted tune(s)
Tune-63997-agua_de_beber.txt 904 Plain-text file with the extracted tune(s)
Tune-63997-get.log 4071 Log file, useful mostly for debugging
Tune-63998-get.log 3688 Log file, useful mostly for debugging
Tune-63999-2261_Cut_and_Dry.abc 761 ABC music file with the extracted tune(s)
Tune-63999-2261_Cut_and_Dry.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-63999-2261_Cut_and_Dry.ps 37885 PostScript
Tune-63999-2261_Cut_and_Dry.txt 761 Plain-text file with the extracted tune(s)
Tune-63999-get.log 9545 Log file, useful mostly for debugging
These files should be available for 24 hours.