midicmd="abc2midi /Users/jc/w/tmp/Tune-8633-Miss_Betsy_Robertson.abc -v -o /Users/jc/w/tmp/Tune-8633-Miss_Betsy_Robertson.midi >>/Users/jc/w/tmp/Tune-8633-get.log 2>&1" returned status 34304.

Error exit status 34304; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 ]
filesizedescription
Form_8633.log 935 Log file, useful mostly for debugging
Tune-8633-Miss_Betsy_Robertson.abc 1751 ABC music file with the extracted tune(s)
Tune-8633-Miss_Betsy_Robertson.txt 1751 Plain-text file with the extracted tune(s)
Tune-8633-get.log 4162 Log file, useful mostly for debugging
Tune-86331-get.log 31673 Log file, useful mostly for debugging
These files should be available for 24 hours.