pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-40668-042_a_French_Cotillion.ps) >>/Users/jc/w/tmp/Tune-40668-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnTreat/GftF/042_a_French_Cotillion.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-40668-042_a_French_Cotillion.abc 590 ABC music file with the extracted tune(s)
Tune-40668-042_a_French_Cotillion.ps 33478 PostScript
Tune-40668-042_a_French_Cotillion.txt 590 Plain-text file with the extracted tune(s)
Tune-40668-get.log 4793 Log file, useful mostly for debugging
These files should be available for 24 hours.