Large source files

Hi

I'm using ddd to debug a very large source file, ~40,000 lines, but ddd will only show me the first 10,000 or so.  Unfortunately I can't split the file.  How can I increase the source window buffer capacity?

Thanks,
Martin L

**************************************************
To view the terms under which this email is 
distributed, please go to 
http://www2.hull.ac.uk/legal/disclaimer.aspx
**************************************************