pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-43308-test2.ps) >>/Users/jc/w/tmp/Tune-43308-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/BostonCollection/test2.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-43308-Stow_Fair.abc 480 ABC music file with the extracted tune(s)
Tune-43308-Stow_Fair.pdf 13034 Portable Data Format
Tune-43308-Stow_Fair.ps 34693 PostScript
Tune-43308-Stow_Fair.txt 480 Plain-text file with the extracted tune(s)
Tune-43308-get.log 10133 Log file, useful mostly for debugging
Tune-43308-test2.abc 7744 ABC music file with the extracted tune(s)
Tune-43308-test2.ps 104873 PostScript
Tune-43308-test2.txt 7744 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.