pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-94933-10451_CLASPERS_HORNPIPE.ps) >>/Users/jc/w/tmp/Tune-94933-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kohlers/10451_CLASPERS_HORNPIPE.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_94933.log 1008430 Log file, useful mostly for debugging
Tune-94933-10451_CLASPERS_HORNPIPE.abc 573 ABC music file with the extracted tune(s)
Tune-94933-10451_CLASPERS_HORNPIPE.ps 35670 PostScript
Tune-94933-10451_CLASPERS_HORNPIPE.txt 573 Plain-text file with the extracted tune(s)
Tune-94933-get.log 4760 Log file, useful mostly for debugging
These files should be available for 24 hours.