Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/14201-Old_Collins_Complaint-abc1.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-596-all.ps) >>/Users/jc/w/tmp/Tune-596-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/14201-Old_Collins_Complaint-abc1.abc/all

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Coll_59613.log 150576 Log file, useful mostly for debugging
Find_59625.log 1463 Log file, useful mostly for debugging
Form_59634.log 1007 Log file, useful mostly for debugging
Form_59642.log 923 Log file, useful mostly for debugging
Form_59650.log 1269 Log file, useful mostly for debugging
Form_59697.log 1261 Log file, useful mostly for debugging
Tune-596-all.abc 184 ABC music file with the extracted tune(s)
Tune-596-all.ps 6 PostScript
Tune-596-all.txt 184 Plain-text file with the extracted tune(s)
Tune-596-get.log 4120 Log file, useful mostly for debugging
Tune-59601-get.log 4055 Log file, useful mostly for debugging
Tune-59607-get.log 1382 Log file, useful mostly for debugging
Tune-59611-get.log 5355 Log file, useful mostly for debugging
Tune-59631-get.log 1382 Log file, useful mostly for debugging
Tune-59637-get.log 1382 Log file, useful mostly for debugging
Tune-59643-get.log 1382 Log file, useful mostly for debugging
Tune-59649-get.log 1382 Log file, useful mostly for debugging
Tune-59655-get.log 1382 Log file, useful mostly for debugging
Tune-59666-get.log 4619 Log file, useful mostly for debugging
Tune-59672-get.log 1382 Log file, useful mostly for debugging
Tune-59676-get.log 5562 Log file, useful mostly for debugging
Tune-59679-get.log 1382 Log file, useful mostly for debugging
Tune-59685-get.log 1382 Log file, useful mostly for debugging
Tune-59693-get.log 1382 Log file, useful mostly for debugging
These files should be available for 24 hours.