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    Nintex Knowledge Base

    Error “Error. Object reference not set to an instance of an object."

    Status: Validated

    ISSUE
    When trying to publish a workflow that was previously designed and published with a user account that no longer exists, the workflow designer page displays a red banner with the following message:

    Error. Object not set to an instance of an object.

    Additionally, the workflow versions are not available.
    ERROR CODE
    The ULS logs also captures the error with the following entry:
    RESOLUTION
    Republish the workflow with an existing, valid user account.
    ADDITIONAL INFORMATION
    The reason behind this error is the user/account that does not exist anymore in the Active Directory structure.

    To minimize this problem as much as possible in the future consider using an account just for this task rather than a human user account (as people are likely to change often).
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