pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5103-08_la_Diligence.ps) >>/Users/jc/w/tmp/Tune-5103-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1770/Longman_Cotillons/08_la_Diligence.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_51035.log 1066915 Log file, useful mostly for debugging
Tune-5103-08_la_Diligence.abc 1991 ABC music file with the extracted tune(s)
Tune-5103-08_la_Diligence.ps 45670 PostScript
Tune-5103-08_la_Diligence.txt 1991 Plain-text file with the extracted tune(s)
Tune-5103-get.log 4759 Log file, useful mostly for debugging
Tune-51038-get.log 4484 Log file, useful mostly for debugging
These files should be available for 24 hours.