pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7530-b.ps) >>/Users/jc/w/tmp/Tune-7530-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/b.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
Coll_75300.log 263116 Log file, useful mostly for debugging
Coll_75302.log 64454 Log file, useful mostly for debugging
Coll_75303.log 67964 Log file, useful mostly for debugging
Coll_75306.log 63374 Log file, useful mostly for debugging
Tune-7530-b.abc 680 ABC music file with the extracted tune(s)
Tune-7530-b.ps 36517 PostScript
Tune-7530-b.txt 680 Plain-text file with the extracted tune(s)
Tune-7530-get.log 4306 Log file, useful mostly for debugging
Tune-75308-get.log 5198 Log file, useful mostly for debugging
These files should be available for 24 hours.