pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8380-Pretty_Martha_Schottische_Ghw049_1.ps) >>/Users/jc/w/tmp/Tune-8380-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/shottish/Pretty_Martha_Schottische_Ghw049_1.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_83800.log 304000 Log file, useful mostly for debugging
Coll_83806.log 271684 Log file, useful mostly for debugging
Tune-8380-Pretty_Martha_Schottische_Ghw049_1.abc 655 ABC music file with the extracted tune(s)
Tune-8380-Pretty_Martha_Schottische_Ghw049_1.ps 39328 PostScript
Tune-8380-Pretty_Martha_Schottische_Ghw049_1.txt 655 Plain-text file with the extracted tune(s)
Tune-8380-get.log 5044 Log file, useful mostly for debugging
Tune-83801-get.log 1338 Log file, useful mostly for debugging
These files should be available for 24 hours.