pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9650-411_DanceToYourDaddyEtc-withVariations.ps) >>/Users/jc/w/tmp/Tune-9650-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Pringle/411_DanceToYourDaddyEtc-withVariations.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_9650.log 476610 Log file, useful mostly for debugging
Coll_96501.log 266610 Log file, useful mostly for debugging
Coll_96504.log 476609 Log file, useful mostly for debugging
Coll_96507.log 769819 Log file, useful mostly for debugging
Coll_96509.log 273610 Log file, useful mostly for debugging
Tune-9650-411_DanceToYourDaddyEtc-withVariations.abc 2402 ABC music file with the extracted tune(s)
Tune-9650-411_DanceToYourDaddyEtc-withVariations.ps 55584 PostScript
Tune-9650-411_DanceToYourDaddyEtc-withVariations.txt 2402 Plain-text file with the extracted tune(s)
Tune-9650-get.log 22254 Log file, useful mostly for debugging
Tune-96500-get.log 27378 Log file, useful mostly for debugging
Tune-96501-get.log 46850 Log file, useful mostly for debugging
Tune-96502-get.log 171900 Log file, useful mostly for debugging
Tune-96504-get.log 3818 Log file, useful mostly for debugging
Tune-96505-get.log 1354 Log file, useful mostly for debugging
Tune-96507-get.log 19125 Log file, useful mostly for debugging
Tune-96508-get.log 167361 Log file, useful mostly for debugging
These files should be available for 24 hours.