pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5079-10882_MR_THOS_JARVISS_REEL.ps) >>/Users/jc/w/tmp/Tune-5079-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/10882_MR_THOS_JARVISS_REEL.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_50793.log 264661 Log file, useful mostly for debugging
Coll_50799.log 275903 Log file, useful mostly for debugging
Form_50792.log 1669 Log file, useful mostly for debugging
Form_50793.log 1645 Log file, useful mostly for debugging
Form_50797.log 862 Log file, useful mostly for debugging
Tune-5079-10882_MR_THOS_JARVISS_REEL.abc 518 ABC music file with the extracted tune(s)
Tune-5079-10882_MR_THOS_JARVISS_REEL.ps 35179 PostScript
Tune-5079-10882_MR_THOS_JARVISS_REEL.txt 518 Plain-text file with the extracted tune(s)
Tune-5079-get.log 8405 Log file, useful mostly for debugging
Tune-50792-get.log 10762 Log file, useful mostly for debugging
Tune-50795-get.log 5939 Log file, useful mostly for debugging
Tune-50798-get.log 3528 Log file, useful mostly for debugging
Tune-50799-get.log 5719 Log file, useful mostly for debugging
These files should be available for 24 hours.