pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-93347-N2K_polk.ps) >>/Users/jc/w/tmp/Tune-93347-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/scand/N2K_polk.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-93347-N2K_polk.abc 2107 ABC music file with the extracted tune(s)
Tune-93347-N2K_polk.ps 53525 PostScript
Tune-93347-N2K_polk.txt 2107 Plain-text file with the extracted tune(s)
Tune-93347-get.log 6153 Log file, useful mostly for debugging
These files should be available for 24 hours.