pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-37403-31992_LES_FARCEURS_VALSE_4.ps) >>/Users/jc/w/tmp/Tune-37403-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/31992_LES_FARCEURS_VALSE_4.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-37403-31992_LES_FARCEURS_VALSE_4.abc 808 ABC music file with the extracted tune(s)
Tune-37403-31992_LES_FARCEURS_VALSE_4.ps 37547 PostScript
Tune-37403-31992_LES_FARCEURS_VALSE_4.txt 808 Plain-text file with the extracted tune(s)
Tune-37403-get.log 4841 Log file, useful mostly for debugging
These files should be available for 24 hours.