Mismatch: X:1072 doesn't match requested X:818
X:818 not found in http://colinhume.com/ABC.txt

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 ]
filesizedescription
Coll_13813.log 143333 Log file, useful mostly for debugging
Form_13813.log 856 Log file, useful mostly for debugging
Tune-13813-ABC.abc 0 ABC music file with the extracted tune(s)
Tune-13813-ABC.txt 0 Plain-text file with the extracted tune(s)
Tune-13813-get.log 566756 Log file, useful mostly for debugging
These files should be available for 24 hours.