pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4029-3251_the_Fyket.ps) >>/Users/jc/w/tmp/Tune-4029-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/3251_the_Fyket.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_40297.log 1229895 Log file, useful mostly for debugging
Form_40294.log 864 Log file, useful mostly for debugging
Tune-4029-3251_the_Fyket.abc 900 ABC music file with the extracted tune(s)
Tune-4029-3251_the_Fyket.ps 41215 PostScript
Tune-4029-3251_the_Fyket.txt 900 Plain-text file with the extracted tune(s)
Tune-4029-get.log 4472 Log file, useful mostly for debugging
Tune-40297-get.log 5535 Log file, useful mostly for debugging
Tune-40298-get.log 5503 Log file, useful mostly for debugging
These files should be available for 24 hours.