pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-90119-4121.ps) >>/Users/jc/w/tmp/Tune-90119-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/4121=Aitken_Drum.abc2.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_90119.log 455609 Log file, useful mostly for debugging
Tune-90119-4121.abc 1037 ABC music file with the extracted tune(s)
Tune-90119-4121.ps 39369 PostScript
Tune-90119-4121.txt 1037 Plain-text file with the extracted tune(s)
Tune-90119-get.log 4635 Log file, useful mostly for debugging
These files should be available for 24 hours.