pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7443-Sull_Sull_D.ps) >>/Users/jc/w/tmp/Tune-7443-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/mazurka/Sull_Sull_D.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_74432.log 263259 Log file, useful mostly for debugging
Coll_74434.log 228 Log file, useful mostly for debugging
Tune-7443-Sull_Sull_D.abc 446 ABC music file with the extracted tune(s)
Tune-7443-Sull_Sull_D.ps 34707 PostScript
Tune-7443-Sull_Sull_D.txt 446 Plain-text file with the extracted tune(s)
Tune-7443-get.log 4460 Log file, useful mostly for debugging
Tune-74433-get.log 1496 Log file, useful mostly for debugging
Tune-74436-get.log 5678 Log file, useful mostly for debugging
Tune-74438-get.log 3865 Log file, useful mostly for debugging
Tune-74439-get.log 9884 Log file, useful mostly for debugging
These files should be available for 24 hours.