pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-30416-10612_EDINBRO_NORTH_BRIDGE_HORNPIPE.ps) >>/Users/jc/w/tmp/Tune-30416-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/10612_EDINBRO_NORTH_BRIDGE_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_30416.log 964 Log file, useful mostly for debugging
Tune-30416-10612_EDINBRO_NORTH_BRIDGE_HORNPIPE.abc 714 ABC music file with the extracted tune(s)
Tune-30416-10612_EDINBRO_NORTH_BRIDGE_HORNPIPE.ps 38398 PostScript
Tune-30416-10612_EDINBRO_NORTH_BRIDGE_HORNPIPE.txt 714 Plain-text file with the extracted tune(s)
Tune-30416-get.log 8954 Log file, useful mostly for debugging
These files should be available for 24 hours.