pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-50834-138.ps) >>/Users/jc/w/tmp/Tune-50834-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Fraser/138=My_Bonny_Brunette.abc2.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_50834.log 319086 Log file, useful mostly for debugging
Tune-50834-138.abc 1543 ABC music file with the extracted tune(s)
Tune-50834-138.ps 42918 PostScript
Tune-50834-138.txt 1543 Plain-text file with the extracted tune(s)
Tune-50834-get.log 10234 Log file, useful mostly for debugging
These files should be available for 24 hours.