pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-81041-sammartini-sonata-01.ps) >>/Users/jc/w/tmp/Tune-81041-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/musicaviva.com/tunes/sammartini-giuseppe/sammartini-sonata-01/sammartini-sonata-01.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
Tune-81041-get.log 6657 Log file, useful mostly for debugging
Tune-81041-sammartini-sonata-01.abc 2238 ABC music file with the extracted tune(s)
Tune-81041-sammartini-sonata-01.ps 65346 PostScript
Tune-81041-sammartini-sonata-01.txt 2238 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.