midicmd="abc2midi /u/guests/jc/w/tmp/Tune-25202-melnets_big_abc_file.abc -v -o /u/guests/jc/w/tmp/Tune-25202-melnets_big_abc_file.midi >>/u/guests/jc/w/tmp/Tune-25202-get.log 2>&1" returned status 11.

Error exit status 11; here are some files to check:
[get.cgi V=1/1 B=1 scale=0.65 512x512 ]
filesizedescription
Tune-25202-get.log 28295 Log file, useful mostly for debugging
Tune-25202-melnets_big_abc_file.abc 1841 ABC music file with the extracted tune(s)
Tune-25202-melnets_big_abc_file.txt 1841 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.