pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-40640-347_Caledonian_Laddie.ps) >>/Users/jc/w/tmp/Tune-40640-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1798/Preston/347_Caledonian_Laddie.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_40640.log 296010 Log file, useful mostly for debugging
Tune-40640-347_Caledonian_Laddie.abc 962 ABC music file with the extracted tune(s)
Tune-40640-347_Caledonian_Laddie.ps 36404 PostScript
Tune-40640-347_Caledonian_Laddie.txt 962 Plain-text file with the extracted tune(s)
Tune-40640-get.log 9681 Log file, useful mostly for debugging
These files should be available for 24 hours.