pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5155-demo.ps) >>/Users/jc/w/tmp/Tune-5155-get.log 2>&1" returned status 256
http://abc.sf.net/abcMIDI/original/demo.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_51551.log 270949 Log file, useful mostly for debugging
Coll_51558.log 67154 Log file, useful mostly for debugging
Form_51551.log 756 Log file, useful mostly for debugging
Form_51559.log 720 Log file, useful mostly for debugging
Tune-5155-demo.abc 387 ABC music file with the extracted tune(s)
Tune-5155-demo.ps 36506 PostScript
Tune-5155-demo.txt 387 Plain-text file with the extracted tune(s)
Tune-5155-get.log 3994 Log file, useful mostly for debugging
Tune-51550-get.log 2946 Log file, useful mostly for debugging
Tune-51551-get.log 7030 Log file, useful mostly for debugging
Tune-51553-get.log 4064 Log file, useful mostly for debugging
Tune-51554-get.log 3989 Log file, useful mostly for debugging
Tune-51555-096-001.svg 21531 Scalable Vector Graphics format
Tune-51555-096.abc 406 ABC music file with the extracted tune(s)
Tune-51555-096.txt 406 Plain-text file with the extracted tune(s)
Tune-51555-get.log 4186 Log file, useful mostly for debugging
Tune-51557-get.log 7758 Log file, useful mostly for debugging
Tune-51559-get.log 4341 Log file, useful mostly for debugging
These files should be available for 24 hours.