pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-612-V4.ps) >>/Users/jc/w/tmp/Tune-612-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/BostonCollection/V4.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_61216.log 312283 Log file, useful mostly for debugging
Coll_61235.log 312283 Log file, useful mostly for debugging
Coll_61254.log 312284 Log file, useful mostly for debugging
Coll_61275.log 312285 Log file, useful mostly for debugging
Coll_61294.log 312283 Log file, useful mostly for debugging
Find_61289.log 1478 Log file, useful mostly for debugging
Form_61229.log 951 Log file, useful mostly for debugging
Tune-612-V4.abc 636 ABC music file with the extracted tune(s)
Tune-612-V4.ps 31166 PostScript
Tune-612-V4.txt 636 Plain-text file with the extracted tune(s)
Tune-612-get.log 6206 Log file, useful mostly for debugging
Tune-6121-get.log 1376 Log file, useful mostly for debugging
Tune-61212-get.log 1388 Log file, useful mostly for debugging
Tune-61250-get.log 1360 Log file, useful mostly for debugging
Tune-61267-get.log 1472 Log file, useful mostly for debugging
Tune-6127-get.log 1413 Log file, useful mostly for debugging
Tune-61274-get.log 1399 Log file, useful mostly for debugging
These files should be available for 24 hours.