pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6902-Margaret_Ann_Robertson-D-64-6.ps) >>/Users/jc/w/tmp/Tune-6902-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/waltz0/Margaret_Ann_Robertson-D-64-6.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_69028.log 66518 Log file, useful mostly for debugging
Tune-6902-Margaret_Ann_Robertson-D-64-6.abc 580 ABC music file with the extracted tune(s)
Tune-6902-Margaret_Ann_Robertson-D-64-6.ps 36984 PostScript
Tune-6902-Margaret_Ann_Robertson-D-64-6.txt 580 Plain-text file with the extracted tune(s)
Tune-6902-get.log 4615 Log file, useful mostly for debugging
Tune-69024-get.log 1515 Log file, useful mostly for debugging
These files should be available for 24 hours.