pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-93174-Mug_House.ps) >>/Users/jc/w/tmp/Tune-93174-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnWalsh/Mug_House.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-93174-Mug_House.abc 1368 ABC music file with the extracted tune(s)
Tune-93174-Mug_House.ps 35050 PostScript
Tune-93174-Mug_House.txt 1368 Plain-text file with the extracted tune(s)
Tune-93174-get.log 4403 Log file, useful mostly for debugging
These files should be available for 24 hours.