Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21629_FINE.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9980-all.ps) >>/Users/jc/w/tmp/Tune-9980-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21629_FINE.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_99804.log 714785 Log file, useful mostly for debugging
Form_9980.log 867 Log file, useful mostly for debugging
Form_99803.log 840 Log file, useful mostly for debugging
Form_99805.log 826 Log file, useful mostly for debugging
Tune-9980-all.abc 162 ABC music file with the extracted tune(s)
Tune-9980-all.ps 6 PostScript
Tune-9980-all.txt 162 Plain-text file with the extracted tune(s)
Tune-9980-get.log 4003 Log file, useful mostly for debugging
Tune-99802-english.abc 168 ABC music file with the extracted tune(s)
Tune-99802-english.pdf 2217 Portable Data Format
Tune-99802-english.ps 6 PostScript
Tune-99802-english.txt 168 Plain-text file with the extracted tune(s)
Tune-99802-get.log 10359 Log file, useful mostly for debugging
Tune-99804-075_la_Soirre_du_Vauxhall.abc 564 ABC music file with the extracted tune(s)
Tune-99804-075_la_Soirre_du_Vauxhall.pdf 12728 Portable Data Format
Tune-99804-075_la_Soirre_du_Vauxhall.ps 33940 PostScript
Tune-99804-075_la_Soirre_du_Vauxhall.txt 564 Plain-text file with the extracted tune(s)
Tune-99804-get.log 5790 Log file, useful mostly for debugging
Tune-99805-get.log 3844 Log file, useful mostly for debugging
Tune-99807-103_Cotillon_Francoise.abc 548 ABC music file with the extracted tune(s)
Tune-99807-103_Cotillon_Francoise.ps 33999 PostScript
Tune-99807-103_Cotillon_Francoise.txt 548 Plain-text file with the extracted tune(s)
Tune-99807-get.log 4520 Log file, useful mostly for debugging
Tune-99808-get.log 3890 Log file, useful mostly for debugging
These files should be available for 24 hours.