pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12753-1758_Cahusac_24CD.ps) >>/Users/jc/w/tmp/Tune-12753-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/dfty/1758_Cahusac_24CD.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_12753.log 249206 Log file, useful mostly for debugging
Tune-12753-1758_Cahusac_24CD.abc 15708 ABC music file with the extracted tune(s)
Tune-12753-1758_Cahusac_24CD.ps 139054 PostScript
Tune-12753-1758_Cahusac_24CD.txt 15708 Plain-text file with the extracted tune(s)
Tune-12753-get.log 18395 Log file, useful mostly for debugging
These files should be available for 24 hours.