pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2512-1794_Preston.ps) >>/Users/jc/w/tmp/Tune-2512-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1794_Preston.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_25120.log 256231 Log file, useful mostly for debugging
Coll_25122.log 385490 Log file, useful mostly for debugging
Form_2512.log 860 Log file, useful mostly for debugging
Tune-2512-1794_Preston.abc 20278 ABC music file with the extracted tune(s)
Tune-2512-1794_Preston.ps 122024 PostScript
Tune-2512-1794_Preston.txt 20278 Plain-text file with the extracted tune(s)
Tune-2512-get.log 16991 Log file, useful mostly for debugging
Tune-25125-get.log 5321 Log file, useful mostly for debugging
Tune-25127-get.log 4511 Log file, useful mostly for debugging
Tune-25128-get.log 4641 Log file, useful mostly for debugging
These files should be available for 24 hours.