pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3203-R01.ps) >>/Users/jc/w/tmp/Tune-3203-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Quebec/R01.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_32032.log 457145 Log file, useful mostly for debugging
Coll_32036.log 261853 Log file, useful mostly for debugging
Coll_32039.log 601860 Log file, useful mostly for debugging
Tune-3203-R01.abc 1660 ABC music file with the extracted tune(s)
Tune-3203-R01.ps 49077 PostScript
Tune-3203-R01.txt 1660 Plain-text file with the extracted tune(s)
Tune-3203-get.log 4333 Log file, useful mostly for debugging
These files should be available for 24 hours.