pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5738-endo.ps) >>/Users/jc/w/tmp/Tune-5738-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/endo.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_57380.log 414998 Log file, useful mostly for debugging
Coll_57385.log 457149 Log file, useful mostly for debugging
Coll_57389.log 769055 Log file, useful mostly for debugging
Tune-5738-endo.abc 100 ABC music file with the extracted tune(s)
Tune-5738-endo.ps 6 PostScript
Tune-5738-endo.txt 100 Plain-text file with the extracted tune(s)
Tune-5738-get.log 3782 Log file, useful mostly for debugging
Tune-57380-get.log 10358 Log file, useful mostly for debugging
Tune-57381-24CountryDances_1805_Thompson.abc 19277 ABC music file with the extracted tune(s)
Tune-57381-24CountryDances_1805_Thompson.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-57381-24CountryDances_1805_Thompson.ps 127214 PostScript
Tune-57381-24CountryDances_1805_Thompson.txt 19277 Plain-text file with the extracted tune(s)
Tune-57381-get.log 20951 Log file, useful mostly for debugging
Tune-57383-get.log 4014 Log file, useful mostly for debugging
Tune-57388-get.log 4241 Log file, useful mostly for debugging
These files should be available for 24 hours.