pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78495-3291_Miss_Margrett_Browns_Favourite.ps) >>/Users/jc/w/tmp/Tune-78495-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/3291_Miss_Margrett_Browns_Favourite.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-78495-3291_Miss_Margrett_Browns_Favourite.abc 1091 ABC music file with the extracted tune(s)
Tune-78495-3291_Miss_Margrett_Browns_Favourite.ps 41355 PostScript
Tune-78495-3291_Miss_Margrett_Browns_Favourite.txt 1091 Plain-text file with the extracted tune(s)
Tune-78495-get.log 5134 Log file, useful mostly for debugging
These files should be available for 24 hours.