pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-18012-0903_GRAND_MARCH_IN_NATHALIE.ps) >>/Users/jc/w/tmp/Tune-18012-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/BostonCollection/0903_GRAND_MARCH_IN_NATHALIE.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_18012.log 883 Log file, useful mostly for debugging
Tune-18012-0903_GRAND_MARCH_IN_NATHALIE.abc 702 ABC music file with the extracted tune(s)
Tune-18012-0903_GRAND_MARCH_IN_NATHALIE.ps 35386 PostScript
Tune-18012-0903_GRAND_MARCH_IN_NATHALIE.txt 702 Plain-text file with the extracted tune(s)
Tune-18012-get.log 8441 Log file, useful mostly for debugging
These files should be available for 24 hours.