pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-52901-107_la_Blanchiffeu.ps) >>/Users/jc/w/tmp/Tune-52901-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Stewart/SCAJMR/107_la_Blanchiffeu.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-52901-107_la_Blanchiffeu.abc 540 ABC music file with the extracted tune(s)
Tune-52901-107_la_Blanchiffeu.ps 33704 PostScript
Tune-52901-107_la_Blanchiffeu.txt 540 Plain-text file with the extracted tune(s)
Tune-52901-get.log 6055 Log file, useful mostly for debugging
These files should be available for 24 hours.