DataSource.Error : OLE DB : Multiple-step OLE DB operation generated errors.

Hi Adrien,

For this error,  following are two possible causes of this error:

• In the registry, under the key for an OLE DB provider's CLSID, there may be an entry named OLEDB_SERVICES. If the OLE DB provider that is used to make the ADO connection does not have the OLEDB_SERVICES entry, and ADO tries to set up a property that is not supported by the provider, the error occurs. For more information about this registry entry, see the "Resolution" section.
• If OLEDB_SERVICES entry exists but there is a problem in the ADO connection string, the error occurs.

Please refer to the link below to see the details.

https://support.microsoft.com/en-in/help/269495/prb-multiple-step-ole-db-operation-generated-errors-when-opening-ado-connection

Regards,

Charlie Liao