pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-61317-Gallini_NewColl44Cot2.ps) >>/Users/jc/w/tmp/Tune-61317-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gallini_NewColl44Cot2.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_61317.log 646820 Log file, useful mostly for debugging
Tune-61317-Gallini_NewColl44Cot2.abc 99575 ABC music file with the extracted tune(s)
Tune-61317-Gallini_NewColl44Cot2.ps 647153 PostScript
Tune-61317-Gallini_NewColl44Cot2.txt 99575 Plain-text file with the extracted tune(s)
Tune-61317-get.log 34477 Log file, useful mostly for debugging
These files should be available for 24 hours.