pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-26698-ONeills_DoubleJigs0001-0365.ps) >>/Users/jc/w/tmp/Tune-26698-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/_1001/ONeills_DoubleJigs0001-0365.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-26698-ONeills_DoubleJigs0001-0365.abc 212082 ABC music file with the extracted tune(s)
Tune-26698-ONeills_DoubleJigs0001-0365.ps 1050982 PostScript
Tune-26698-ONeills_DoubleJigs0001-0365.txt 212082 Plain-text file with the extracted tune(s)
Tune-26698-get.log 250288 Log file, useful mostly for debugging
These files should be available for 24 hours.