pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4885-1791_POLACCA.ps) >>/Users/jc/w/tmp/Tune-4885-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/BostonCollection/1791_POLACCA.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-4885-1791_POLACCA.abc 1679 ABC music file with the extracted tune(s)
Tune-4885-1791_POLACCA.ps 48153 PostScript
Tune-4885-1791_POLACCA.txt 1679 Plain-text file with the extracted tune(s)
Tune-4885-get.log 8523 Log file, useful mostly for debugging
Tune-48851-get.log 3330 Log file, useful mostly for debugging
Tune-48852-get.log 4460 Log file, useful mostly for debugging
Tune-48853-get.log 4138 Log file, useful mostly for debugging
Tune-48855-get.log 4810 Log file, useful mostly for debugging
Tune-48856-_.abc 138 ABC music file with the extracted tune(s)
Tune-48856-_.ps 6 PostScript
Tune-48856-_.txt 138 Plain-text file with the extracted tune(s)
Tune-48856-get.log 3923 Log file, useful mostly for debugging
Tune-48857-get.log 6002 Log file, useful mostly for debugging
Tune-48858-get.log 4056 Log file, useful mostly for debugging
These files should be available for 24 hours.