pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7280-1770_Longman_Cotillons.ps) >>/Users/jc/w/tmp/Tune-7280-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1770_Longman_Cotillons.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_72801.log 1173629 Log file, useful mostly for debugging
Coll_72809.log 451411 Log file, useful mostly for debugging
Form_7280.log 1045 Log file, useful mostly for debugging
Form_72803.log 876 Log file, useful mostly for debugging
Tune-7280-1770_Longman_Cotillons.abc 38520 ABC music file with the extracted tune(s)
Tune-7280-1770_Longman_Cotillons.ps 269156 PostScript
Tune-7280-1770_Longman_Cotillons.txt 38520 Plain-text file with the extracted tune(s)
Tune-7280-get.log 19708 Log file, useful mostly for debugging
These files should be available for 24 hours.