pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-58821-3021_Captain_Robertson_Ludes.ps) >>/Users/jc/w/tmp/Tune-58821-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kerr/MM3/3021_Captain_Robertson_Ludes.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-58821-3021_Captain_Robertson_Ludes.abc 493 ABC music file with the extracted tune(s)
Tune-58821-3021_Captain_Robertson_Ludes.ps 35540 PostScript
Tune-58821-3021_Captain_Robertson_Ludes.txt 493 Plain-text file with the extracted tune(s)
Tune-58821-get.log 4943 Log file, useful mostly for debugging
These files should be available for 24 hours.