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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Error: The following f...
Small and medium business | Business Central, N...
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Error: The following fields must be of the same type

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Posted on by Maddin 30

Hello guys,

I currently get the error message when I call a table with Run that two fields must have the same data type.

Field:      Approved On <- Approved on
Table:    Table A <- Table B
Type:      DateTime <- Date

Now I was thinking about just changing the datatype Date to DateTime, but I am afraid that this could lead to a loss of data. Is this the case?

What is the best way to correct this error?

Thank you!


I have the same question (0)
  • Suggested answer
    Nitin Verma Profile Picture
    Nitin Verma 21,700 Moderator on at

    Hi Maddin ,

    It happens when you are using Copy function of Transferfields function between two tables.

    To overcome this situation use below logic

    First create a new field with the same data type which you dont want to loss data, and then put some logic so that you can transfer that field's value into new field and then please change the Datatype to resolve the error, and check then if data loss if yes then move your data from new field to old field (after changed the data type).

    Hope this logic will help you.

  • Verified answer
    YUN ZHU Profile Picture
    YUN ZHU 95,485 Super User 2025 Season 2 on at

    Hi, just adding to Nitin's reply, It is not recommended to modify the data type directly. You can first use the following method to transfer the data in the table to another new temporary field, then modify the data type, and then transfer back. Finally delete the temporary field.

    CREATEDATETIME Function (DateTime)

    https://docs.microsoft.com/en-us/dynamics-nav/createdatetime-function--datetime-

    Hope this helps.

    Thanks.

    ZHU

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