Mismatch: X:26 doesn't match requested X:4268
X:4268 not found in http://richardrobinson.tunebook.org.uk/data/tunebook.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 ]
filesizedescription
Form_4473.log 918 Log file, useful mostly for debugging
Tune-4473-get.log 3477416 Log file, useful mostly for debugging
Tune-4473-tunebook.abc 0 ABC music file with the extracted tune(s)
Tune-4473-tunebook.txt 0 Plain-text file with the extracted tune(s)
Tune-44734-get.log 1701 Log file, useful mostly for debugging
Tune-44738-get.log 4574 Log file, useful mostly for debugging
These files should be available for 24 hours.