Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/session/Oivan_Ilo/Satumaa-Dm-64-8.abc/tango"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7580-tango.ps) >>/Users/jc/w/tmp/Tune-7580-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/session/Oivan_Ilo/Satumaa-Dm-64-8.abc/tango

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Form_75806.log 1220 Log file, useful mostly for debugging
Tune-7580-get.log 4057 Log file, useful mostly for debugging
Tune-7580-tango.abc 166 ABC music file with the extracted tune(s)
Tune-7580-tango.ps 6 PostScript
Tune-7580-tango.txt 166 Plain-text file with the extracted tune(s)
Tune-75803-get.log 1424 Log file, useful mostly for debugging
Tune-75807-get.log 1424 Log file, useful mostly for debugging
These files should be available for 24 hours.