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    Nintex Knowledge Base

    Error: Unable to get property 'toString' of undefined or null reference

    Status: Validated

    ISSUE
    When accessing a Nintex form, the following error occurs:

    Error: Unable to get property 'toString' of undefined or null reference
    ERROR CODE
    RESOLUTION
    Verify that all Form Variables, Rules, and Controls which are utilizing runtime functions are properly configured and use the correct syntax.
    ADDITIONAL INFORMATION
    This error generally indicates that there is a runtime function which is configured incorrectly, such as with a missing parameter, or utilizes incorrect Syntax.

    For Example the runtime function DateDiffDays:

    Correct Syntax: DateDiffDays(StartDate, EndDate)
    Incorrect Syntax: DateDiffDays(EndDate-StartDate)

    In the incorrect syntax the runtime function does not detect a second parameter which will yield this error.
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