pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2246-0201_WALTZ_BY_STRAUSS.ps) >>/Users/jc/w/tmp/Tune-2246-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/BostonCollection/0201_WALTZ_BY_STRAUSS.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_22468.log 980 Log file, useful mostly for debugging
Tune-2246-0201_WALTZ_BY_STRAUSS.abc 2920 ABC music file with the extracted tune(s)
Tune-2246-0201_WALTZ_BY_STRAUSS.ps 57147 PostScript
Tune-2246-0201_WALTZ_BY_STRAUSS.txt 2920 Plain-text file with the extracted tune(s)
Tune-2246-get.log 4811 Log file, useful mostly for debugging
These files should be available for 24 hours.