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If you see a message like this then this can be more than likely an issue with the mapping of a fact find question. Check on the Vulnerable pages of the fact find.
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Toolbox Error Response: Address Line 1
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This issue will typically occur when the ‘Address Line 1’ field has not data entered against it on the applicants profile
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To resolve this issue open the applicant profile(s) on the case, and make sure that ‘Address Line 1’ has been filled out.