pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-26183-11341_Duetto.ps) >>/Users/jc/w/tmp/Tune-26183-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/MoF/11341_Duetto.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-26183-11341_Duetto.abc 1991 ABC music file with the extracted tune(s)
Tune-26183-11341_Duetto.ps 57257 PostScript
Tune-26183-11341_Duetto.txt 1991 Plain-text file with the extracted tune(s)
Tune-26183-get.log 6550 Log file, useful mostly for debugging
These files should be available for 24 hours.