pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-18997-Book_Hambo.ps) >>/Users/jc/w/tmp/Tune-18997-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/Scand/Book_Hambo.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-18997-Book_Hambo.abc 15033 ABC music file with the extracted tune(s)
Tune-18997-Book_Hambo.ps 219933 PostScript
Tune-18997-Book_Hambo.txt 15033 Plain-text file with the extracted tune(s)
Tune-18997-get.log 7425 Log file, useful mostly for debugging
These files should be available for 24 hours.