pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4992-013_Logie_O_Buchan.ps) >>/Users/jc/w/tmp/Tune-4992-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Chappell/013_Logie_O_Buchan.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_4992.log 410160 Log file, useful mostly for debugging
Coll_49921.log 266066 Log file, useful mostly for debugging
Coll_49926.log 261851 Log file, useful mostly for debugging
Coll_49927.log 263256 Log file, useful mostly for debugging
Tune-4992-013_Logie_O_Buchan.abc 736 ABC music file with the extracted tune(s)
Tune-4992-013_Logie_O_Buchan.ps 36885 PostScript
Tune-4992-013_Logie_O_Buchan.txt 736 Plain-text file with the extracted tune(s)
Tune-4992-get.log 5079 Log file, useful mostly for debugging
These files should be available for 24 hours.