pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-90723-10591_THE_DEAN_BRIDGE_EDINBRO.ps) >>/Users/jc/w/tmp/Tune-90723-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/10591_THE_DEAN_BRIDGE_EDINBRO.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-90723-10591_THE_DEAN_BRIDGE_EDINBRO.abc 842 ABC music file with the extracted tune(s)
Tune-90723-10591_THE_DEAN_BRIDGE_EDINBRO.ps 41606 PostScript
Tune-90723-10591_THE_DEAN_BRIDGE_EDINBRO.txt 842 Plain-text file with the extracted tune(s)
Tune-90723-get.log 4928 Log file, useful mostly for debugging
These files should be available for 24 hours.