pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-15405-091_la_Toute_Travers.ps) >>/Users/jc/w/tmp/Tune-15405-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Stewart/SCAJMR/091_la_Toute_Travers.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-15405-091_la_Toute_Travers.abc 613 ABC music file with the extracted tune(s)
Tune-15405-091_la_Toute_Travers.ps 33469 PostScript
Tune-15405-091_la_Toute_Travers.txt 613 Plain-text file with the extracted tune(s)
Tune-15405-get.log 4734 Log file, useful mostly for debugging
These files should be available for 24 hours.