pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16540-GoodHeartedGlasgow.ps) >>/Users/jc/w/tmp/Tune-16540-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/GoodHeartedGlasgow.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_16540.log 1927014 Log file, useful mostly for debugging
Tune-16540-GoodHeartedGlasgow.abc 1918 ABC music file with the extracted tune(s)
Tune-16540-GoodHeartedGlasgow.ps 48099 PostScript
Tune-16540-GoodHeartedGlasgow.txt 1918 Plain-text file with the extracted tune(s)
Tune-16540-get.log 5060 Log file, useful mostly for debugging
These files should be available for 24 hours.