pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-69486-4041_Captain_Byngs_Reel.ps) >>/Users/jc/w/tmp/Tune-69486-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow/CSR/4041_Captain_Byngs_Reel.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_69486.log 268876 Log file, useful mostly for debugging
Form_69486.log 2554 Log file, useful mostly for debugging
Tune-69486-4041_Captain_Byngs_Reel.abc 876 ABC music file with the extracted tune(s)
Tune-69486-4041_Captain_Byngs_Reel.ps 37825 PostScript
Tune-69486-4041_Captain_Byngs_Reel.txt 876 Plain-text file with the extracted tune(s)
Tune-69486-get.log 4716 Log file, useful mostly for debugging
These files should be available for 24 hours.