pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-37892-116_Lord_Loudons_March.ps) >>/Users/jc/w/tmp/Tune-37892-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Stewart/SCAJMR/116_Lord_Loudons_March.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-37892-116_Lord_Loudons_March.abc 592 ABC music file with the extracted tune(s)
Tune-37892-116_Lord_Loudons_March.ps 33752 PostScript
Tune-37892-116_Lord_Loudons_March.txt 592 Plain-text file with the extracted tune(s)
Tune-37892-get.log 4792 Log file, useful mostly for debugging
These files should be available for 24 hours.