pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4157-MrsStewartOfFasnacloich0.ps) >>/Users/jc/w/tmp/Tune-4157-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/MrsStewartOfFasnacloich0.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_41575.log 1051790 Log file, useful mostly for debugging
Coll_41577.log 1297275 Log file, useful mostly for debugging
Find_41571.log 1734 Log file, useful mostly for debugging
Tune-4157-MrsStewartOfFasnacloich0.abc 1006 ABC music file with the extracted tune(s)
Tune-4157-MrsStewartOfFasnacloich0.ps 38023 PostScript
Tune-4157-MrsStewartOfFasnacloich0.txt 1006 Plain-text file with the extracted tune(s)
Tune-4157-get.log 5208 Log file, useful mostly for debugging
These files should be available for 24 hours.