Forum Discussion

NandanHegde's avatar
NandanHegde
Super User
2 years ago
Solved

Read data from Dataverse table via Fabric Dataflow gen 2

Hello All, Good day!   I am trying to read data from dataverse tables through Farbic dataflow : https://learn.microsoft.com/en-us/fabric/data-factory/connector-dataverse   But getting timeout e...
  • pqian_MSFT's avatar
    pqian_MSFT
    2 years ago

    Looks like this is the same issue as 

    Gen2 Dataflow load to Lakehouse error - Can't inse... - Microsoft Fabric Community

     

    "

    Exception:
    ExceptionType: Microsoft.Mashup.Engine1.Runtime.ValueException, Microsoft.MashupEngine, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
    Message: We can't insert null data into a non-nullable column."
     
    i.e., your source\destination target has nulls but the columns are non-nullable.
     
    You can mark your source table's columns to nullable to fix this for now. We are working on several changes here that will address the issue - such as defaulting to nullable, and surfacing nullability better in the mapping screen.