pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-27456-062_a_Trip_up_Stairs.ps) >>/Users/jc/w/tmp/Tune-27456-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Stewart/SCAJMR/062_a_Trip_up_Stairs.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-27456-062_a_Trip_up_Stairs.abc 657 ABC music file with the extracted tune(s)
Tune-27456-062_a_Trip_up_Stairs.ps 35706 PostScript
Tune-27456-062_a_Trip_up_Stairs.txt 657 Plain-text file with the extracted tune(s)
Tune-27456-get.log 4736 Log file, useful mostly for debugging
These files should be available for 24 hours.