pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91757-3272_Captain_Macduffs_Reel.ps) >>/Users/jc/w/tmp/Tune-91757-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR12/3272_Captain_Macduffs_Reel.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-91757-3272_Captain_Macduffs_Reel.abc 697 ABC music file with the extracted tune(s)
Tune-91757-3272_Captain_Macduffs_Reel.ps 37151 PostScript
Tune-91757-3272_Captain_Macduffs_Reel.txt 697 Plain-text file with the extracted tune(s)
Tune-91757-get.log 4851 Log file, useful mostly for debugging
These files should be available for 24 hours.