pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7789-20482_Newcastle_Hornpipe.ps) >>/Users/jc/w/tmp/Tune-7789-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP2/20482_Newcastle_Hornpipe.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-7789-20482_Newcastle_Hornpipe.abc 667 ABC music file with the extracted tune(s)
Tune-7789-20482_Newcastle_Hornpipe.ps 34374 PostScript
Tune-7789-20482_Newcastle_Hornpipe.txt 667 Plain-text file with the extracted tune(s)
Tune-7789-get.log 5021 Log file, useful mostly for debugging
Tune-77892-get.log 4410 Log file, useful mostly for debugging
Tune-77895-ArthursSeatWaltzes.abc 154 ABC music file with the extracted tune(s)
Tune-77895-ArthursSeatWaltzes.txt 154 Plain-text file with the extracted tune(s)
Tune-77895-get.log 3320 Log file, useful mostly for debugging
Tune-77898-get.log 3907 Log file, useful mostly for debugging
These files should be available for 24 hours.