pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1681-GranvilleMarket1.ps) >>/Users/jc/w/tmp/Tune-1681-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/GranvilleMarket1.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_16810.log 426674 Log file, useful mostly for debugging
Coll_16814.log 285735 Log file, useful mostly for debugging
Coll_16816.log 273090 Log file, useful mostly for debugging
Tune-1681-GranvilleMarket1.abc 1970 ABC music file with the extracted tune(s)
Tune-1681-GranvilleMarket1.ps 48416 PostScript
Tune-1681-GranvilleMarket1.txt 1970 Plain-text file with the extracted tune(s)
Tune-1681-get.log 4975 Log file, useful mostly for debugging
These files should be available for 24 hours.