pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-37400-4333.ps) >>/Users/jc/w/tmp/Tune-37400-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow/CSR/4333=Morag.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-37400-4333.abc 1183 ABC music file with the extracted tune(s)
Tune-37400-4333.ps 42165 PostScript
Tune-37400-4333.txt 1183 Plain-text file with the extracted tune(s)
Tune-37400-get.log 4624 Log file, useful mostly for debugging
These files should be available for 24 hours.