pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-85852-4302.ps) >>/Users/jc/w/tmp/Tune-85852-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/4302=the_Maids_of_Arrochar.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
Tune-85852-4302.abc 1064 ABC music file with the extracted tune(s)
Tune-85852-4302.ps 41630 PostScript
Tune-85852-4302.txt 1064 Plain-text file with the extracted tune(s)
Tune-85852-get.log 4796 Log file, useful mostly for debugging
These files should be available for 24 hours.