pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3666-t.ps) >>/Users/jc/w/tmp/Tune-3666-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/t.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_36669.log 142807 Log file, useful mostly for debugging
Find_36660.log 0 Log file, useful mostly for debugging
Form_36663.log 869 Log file, useful mostly for debugging
Form_36664.log 0 Log file, useful mostly for debugging
Form_36667.log 839 Log file, useful mostly for debugging
Form_36669.log 845 Log file, useful mostly for debugging
Tune-3666-get.log 4752 Log file, useful mostly for debugging
Tune-3666-t.abc 619 ABC music file with the extracted tune(s)
Tune-3666-t.ps 34737 PostScript
Tune-3666-t.txt 619 Plain-text file with the extracted tune(s)
Tune-36661-get.log 1543 Log file, useful mostly for debugging
Tune-36662-get.log 4980 Log file, useful mostly for debugging
These files should be available for 24 hours.