pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-42841-Jefferson_and_Liberty.ps) >>/Users/jc/w/tmp/Tune-42841-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/contra/Jefferson_and_Liberty.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_42841.log 270280 Log file, useful mostly for debugging
Find_42841.log 1574 Log file, useful mostly for debugging
Tune-42841-Jefferson_and_Liberty.abc 1313 ABC music file with the extracted tune(s)
Tune-42841-Jefferson_and_Liberty.ps 37358 PostScript
Tune-42841-Jefferson_and_Liberty.txt 1313 Plain-text file with the extracted tune(s)
Tune-42841-get.log 6095 Log file, useful mostly for debugging
These files should be available for 24 hours.