pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-29686-32633_SANDERSONS_HORNPIPE.ps) >>/Users/jc/w/tmp/Tune-29686-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/32633_SANDERSONS_HORNPIPE.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_29686.log 990 Log file, useful mostly for debugging
Tune-29686-32633_SANDERSONS_HORNPIPE.abc 584 ABC music file with the extracted tune(s)
Tune-29686-32633_SANDERSONS_HORNPIPE.ps 35371 PostScript
Tune-29686-32633_SANDERSONS_HORNPIPE.txt 584 Plain-text file with the extracted tune(s)
Tune-29686-get.log 4814 Log file, useful mostly for debugging
These files should be available for 24 hours.