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Oraoledb: Cannot Convert Between Unicode And Non-Unicode String Data Types (Doc ID 960508.1)

Last updated on JANUARY 29, 2022

Applies to:

Oracle Provider for OLE DB - Version and later
Microsoft Windows x64 (64-bit)
Microsoft Windows (32-bit)


Developing an SSIS package that uses the Oracle OLEDB Provider on a 32 bit operating system and then deploying to a 64 bit SQLServer installation may result in the following error:

[OLE DB Source [1]] Error: column "<columname>" cannot convert between unicode and non-unicode string data types.
[OLE DB Source [1]] Warning: The external columns for component "OLE DB Source" (1) are out of synchronization with the data source columns. The external column "<columname>" needs to be updated.
[SSIS.Pipeline] Error: "component "OLE DB Source" (1)" failed validation and returned validation status "VS_ISBROKEN".




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