pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4980-1796_Cahusac.ps) >>/Users/jc/w/tmp/Tune-4980-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1796_Cahusac.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_49801.log 747418 Log file, useful mostly for debugging
Coll_49806.log 459809 Log file, useful mostly for debugging
Form_49808.log 985 Log file, useful mostly for debugging
Tune-4980-1796_Cahusac.abc 996 ABC music file with the extracted tune(s)
Tune-4980-1796_Cahusac.ps 33744 PostScript
Tune-4980-1796_Cahusac.txt 996 Plain-text file with the extracted tune(s)
Tune-4980-get.log 5005 Log file, useful mostly for debugging
Tune-49802-get.log 1394 Log file, useful mostly for debugging
Tune-49809-get.log 19408 Log file, useful mostly for debugging
These files should be available for 24 hours.