pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5168-MuirlandWillie1.ps) >>/Users/jc/w/tmp/Tune-5168-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/MuirlandWillie1.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_51682.log 287140 Log file, useful mostly for debugging
Coll_51683.log 285735 Log file, useful mostly for debugging
Tune-5168-MuirlandWillie1.abc 1655 ABC music file with the extracted tune(s)
Tune-5168-MuirlandWillie1.ps 45622 PostScript
Tune-5168-MuirlandWillie1.txt 1655 Plain-text file with the extracted tune(s)
Tune-5168-get.log 4931 Log file, useful mostly for debugging
Tune-51683-LilacSunday2003.abc 3947 ABC music file with the extracted tune(s)
Tune-51683-LilacSunday2003.ps 63425 PostScript
Tune-51683-LilacSunday2003.txt 3947 Plain-text file with the extracted tune(s)
Tune-51683-get.log 4656 Log file, useful mostly for debugging
Tune-51686-get.log 1343 Log file, useful mostly for debugging
These files should be available for 24 hours.