pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-59500-082_Merry_today.ps) >>/Users/jc/w/tmp/Tune-59500-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnFrench/082_Merry_today.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_59500.log 146096 Log file, useful mostly for debugging
Tune-59500-082_Merry_today.abc 540 ABC music file with the extracted tune(s)
Tune-59500-082_Merry_today.ps 35496 PostScript
Tune-59500-082_Merry_today.txt 540 Plain-text file with the extracted tune(s)
Tune-59500-get.log 4591 Log file, useful mostly for debugging
These files should be available for 24 hours.