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    Nintex Knowledge Base

    "'ddlDb' has a SelectedValue which is invalid because it does not exist in the list of items" accessing Manage Database Mappings

    Summary
    When attempting to access 'Manage Database Mappings' from Central Administration -> Nintex Workflow Management -> Database Setup the following error might occur: "'ddlDb' has a SelectedValue which is invalid because it does not exist in the list of items."

    Solution

    Perform a SELECT * FROM query on the following Nintex Configuration database tables:

    • dbo.databases
    • dbo.contentdbmapping
    • dbo.storage
    1. Make sure all database names listed from dbo.databases exist and are online.
    2. Make sure that DatabaseID values from dbo.storage and SPContentDbId values from dbo.contentdbmapping match up to a DatabaseID value from dbo.databases

    If you find a reference to a database that doesn't exist, delete it from the table. 

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