pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3862-MissGibsonsStr1.ps) >>/Users/jc/w/tmp/Tune-3862-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/MissGibsonsStr1.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_38627.log 277305 Log file, useful mostly for debugging
Coll_38628.log 686163 Log file, useful mostly for debugging
Find_38629.log 1686 Log file, useful mostly for debugging
Tune-3862-MissGibsonsStr1.abc 2180 ABC music file with the extracted tune(s)
Tune-3862-MissGibsonsStr1.ps 50189 PostScript
Tune-3862-MissGibsonsStr1.txt 2180 Plain-text file with the extracted tune(s)
Tune-3862-get.log 4975 Log file, useful mostly for debugging
These files should be available for 24 hours.