pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7073-John_Anderson_My_Jo_1806.ps) >>/Users/jc/w/tmp/Tune-7073-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CaledonianMusicalRepository/John_Anderson_My_Jo_1806.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_70731.log 459810 Log file, useful mostly for debugging
Coll_70737.log 270810 Log file, useful mostly for debugging
Coll_70739.log 455611 Log file, useful mostly for debugging
Tune-7073-John_Anderson_My_Jo_1806.abc 2568 ABC music file with the extracted tune(s)
Tune-7073-John_Anderson_My_Jo_1806.ps 38040 PostScript
Tune-7073-John_Anderson_My_Jo_1806.txt 2568 Plain-text file with the extracted tune(s)
Tune-7073-get.log 4941 Log file, useful mostly for debugging
Tune-70731-get.log 46623 Log file, useful mostly for debugging
Tune-70733-get.log 59102 Log file, useful mostly for debugging
These files should be available for 24 hours.