pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7611-Rose_Tree-D-32-3.ps) >>/Users/jc/w/tmp/Tune-7611-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/march/Rose_Tree-D-32-3.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
Form_76116.log 953 Log file, useful mostly for debugging
Tune-7611-Rose_Tree-D-32-3.abc 391 ABC music file with the extracted tune(s)
Tune-7611-Rose_Tree-D-32-3.ps 33907 PostScript
Tune-7611-Rose_Tree-D-32-3.txt 391 Plain-text file with the extracted tune(s)
Tune-7611-get.log 4752 Log file, useful mostly for debugging
These files should be available for 24 hours.