pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-767-Tipperary-G-24-3.ps) >>/Users/jc/w/tmp/Tune-767-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/jig/Tipperary-G-24-3.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_76712.log 1208571 Log file, useful mostly for debugging
Coll_76726.log 464012 Log file, useful mostly for debugging
Coll_76750.log 352012 Log file, useful mostly for debugging
Coll_76765.log 3022 Log file, useful mostly for debugging
Tune-767-Tipperary-G-24-3.abc 593 ABC music file with the extracted tune(s)
Tune-767-Tipperary-G-24-3.ps 37225 PostScript
Tune-767-Tipperary-G-24-3.txt 593 Plain-text file with the extracted tune(s)
Tune-767-get.log 5172 Log file, useful mostly for debugging
Tune-7670-get.log 4097 Log file, useful mostly for debugging
Tune-76712-get.log 3999 Log file, useful mostly for debugging
Tune-76719-get.log 4213 Log file, useful mostly for debugging
Tune-7672-get.log 3860 Log file, useful mostly for debugging
Tune-76725-get.log 3896 Log file, useful mostly for debugging
Tune-76731-get.log 3140 Log file, useful mostly for debugging
Tune-76732-get.log 4069 Log file, useful mostly for debugging
Tune-76737-get.log 2973 Log file, useful mostly for debugging
Tune-76738-get.log 4022 Log file, useful mostly for debugging
Tune-76739-get.log 5236 Log file, useful mostly for debugging
Tune-76743-get.log 4397 Log file, useful mostly for debugging
Tune-76756-get.log 4173 Log file, useful mostly for debugging
Tune-76757-get.log 4187 Log file, useful mostly for debugging
Tune-76763-get.log 4599 Log file, useful mostly for debugging
Tune-76766-get.log 5164 Log file, useful mostly for debugging
Tune-76774-get.log 5047 Log file, useful mostly for debugging
Tune-7678-get.log 4917 Log file, useful mostly for debugging
Tune-76782-get.log 9682 Log file, useful mostly for debugging
Tune-76787-get.log 1402 Log file, useful mostly for debugging
Tune-7679-get.log 4857 Log file, useful mostly for debugging
Tune-76790-get.log 5182 Log file, useful mostly for debugging
Tune-76797-get.log 4284 Log file, useful mostly for debugging
These files should be available for 24 hours.