pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8291-RobsonStrathspey1.ps) >>/Users/jc/w/tmp/Tune-8291-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/RobsonStrathspey1.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_82914.log 292760 Log file, useful mostly for debugging
Coll_82919.log 280115 Log file, useful mostly for debugging
Tune-8291-RobsonStrathspey1.abc 2676 ABC music file with the extracted tune(s)
Tune-8291-RobsonStrathspey1.ps 47314 PostScript
Tune-8291-RobsonStrathspey1.txt 2676 Plain-text file with the extracted tune(s)
Tune-8291-get.log 5020 Log file, useful mostly for debugging
Tune-82918-SeannTriubhasWillichan1.abc 2275 ABC music file with the extracted tune(s)
Tune-82918-SeannTriubhasWillichan1.pdf 49568 Portable Data Format
Tune-82918-SeannTriubhasWillichan1.ps 48821 PostScript
Tune-82918-SeannTriubhasWillichan1.txt 2275 Plain-text file with the extracted tune(s)
Tune-82918-get.log 6166 Log file, useful mostly for debugging
Tune-82919-ChristiesStr-001.svg 104671 Scalable Vector Graphics format
Tune-82919-ChristiesStr.abc 2693 ABC music file with the extracted tune(s)
Tune-82919-ChristiesStr.txt 2693 Plain-text file with the extracted tune(s)
Tune-82919-get.log 4593 Log file, useful mostly for debugging
These files should be available for 24 hours.