Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/DftY/Skillern.abc/1782"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5410-1782.ps) >>/Users/jc/w/tmp/Tune-5410-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/Skillern.abc/1782

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_54100.log 753600 Log file, useful mostly for debugging
Coll_54103.log 493679 Log file, useful mostly for debugging
Form_54103.log 1166 Log file, useful mostly for debugging
Form_54104.log 815 Log file, useful mostly for debugging
Tune-5410-1782.abc 150 ABC music file with the extracted tune(s)
Tune-5410-1782.ps 6 PostScript
Tune-5410-1782.txt 150 Plain-text file with the extracted tune(s)
Tune-5410-get.log 8907 Log file, useful mostly for debugging
Tune-54101-get.log 1429 Log file, useful mostly for debugging
Tune-54102-get.log 4352 Log file, useful mostly for debugging
Tune-54105-get.log 6120 Log file, useful mostly for debugging
Tune-54106-get.log 5628 Log file, useful mostly for debugging
These files should be available for 24 hours.