pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-55764-WallomGreen_PLFD1687_290.ps) >>/Users/jc/w/tmp/Tune-55764-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/WallomGreen_PLFD1687_290.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-55764-Mary_McKays_Hornpipe.abc 443 ABC music file with the extracted tune(s)
Tune-55764-Mary_McKays_Hornpipe.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-55764-Mary_McKays_Hornpipe.ps 34855 PostScript
Tune-55764-Mary_McKays_Hornpipe.txt 443 Plain-text file with the extracted tune(s)
Tune-55764-WallomGreen_PLFD1687_290.abc 467 ABC music file with the extracted tune(s)
Tune-55764-WallomGreen_PLFD1687_290.ps 35803 PostScript
Tune-55764-WallomGreen_PLFD1687_290.txt 467 Plain-text file with the extracted tune(s)
Tune-55764-get.log 10479 Log file, useful mostly for debugging
These files should be available for 24 hours.