I get a 'Bad request' or 'Header field too large' error
If you are unable to view a resource and get one of the following error messages, try the steps outlined to resolve the issue.
Error messages:
- Bad request
- Request header fields too large
- Request header field exceeds server limit
- You may have logged in too many times in your session
- Error 400 or 431
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You need to clear your browser cookies and cache before trying to access the resource again.
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Try accessing the resource in a different web browser (e.g. Edge or Chrome).
If you have completed these steps but still get the error message, please report the issue to the Library and a member of staff will assist you.