pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4268-MARBONE3.ps) >>/Users/jc/w/tmp/Tune-4268-get.log 2>&1" returned status 256
http://back.numachi.com:8000/dtrad/abc/MARBONE3.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-4268-MARBONE3.abc 233 ABC music file with the extracted tune(s)
Tune-4268-MARBONE3.ps 33721 PostScript
Tune-4268-MARBONE3.txt 233 Plain-text file with the extracted tune(s)
Tune-4268-get.log 7704 Log file, useful mostly for debugging
Tune-42688-get.log 2811 Log file, useful mostly for debugging
These files should be available for 24 hours.