pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22595-ShiftinBobbins1.ps) >>/Users/jc/w/tmp/Tune-22595-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/ShiftinBobbins1.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_22595.log 292760 Log file, useful mostly for debugging
Tune-22595-ShiftinBobbins1.abc 2191 ABC music file with the extracted tune(s)
Tune-22595-ShiftinBobbins1.ps 51203 PostScript
Tune-22595-ShiftinBobbins1.txt 2191 Plain-text file with the extracted tune(s)
Tune-22595-get.log 4968 Log file, useful mostly for debugging
These files should be available for 24 hours.