Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/abc/session/RoM/Hundred_Pipers-A-32-2.abc/jig"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5143-jig.ps) >>/Users/jc/w/tmp/Tune-5143-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/session/RoM/Hundred_Pipers-A-32-2.abc/jig

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_5143.log 563217 Log file, useful mostly for debugging
Coll_51437.log 313836 Log file, useful mostly for debugging
Form_51430.log 864 Log file, useful mostly for debugging
Form_51433.log 2567 Log file, useful mostly for debugging
Form_51434.log 832 Log file, useful mostly for debugging
Form_51437.log 829 Log file, useful mostly for debugging
Tune-5143-get.log 4039 Log file, useful mostly for debugging
Tune-5143-jig.abc 168 ABC music file with the extracted tune(s)
Tune-5143-jig.ps 6 PostScript
Tune-5143-jig.txt 168 Plain-text file with the extracted tune(s)
Tune-51433-get.log 8262 Log file, useful mostly for debugging
Tune-51438-get.log 14501 Log file, useful mostly for debugging
Tune-51439-get.log 10830 Log file, useful mostly for debugging
These files should be available for 24 hours.