pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-37688-General_Guinness.ps) >>/Users/jc/w/tmp/Tune-37688-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/Ireland/General_Guinness.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-37688-General_Guinness.abc 3178 ABC music file with the extracted tune(s)
Tune-37688-General_Guinness.ps 44641 PostScript
Tune-37688-General_Guinness.txt 3178 Plain-text file with the extracted tune(s)
Tune-37688-get.log 6576 Log file, useful mostly for debugging
These files should be available for 24 hours.