This method can be replaced by the .NET replacement method [setAttributesInBatchFlat](🔗).
**Type**: void
**Parameters**
| Name | Type | Value |
| sessionId | String | ID of the session |
| recipientListId | long | ID of the recipient list |
| recipientIds | String[ ] | IDs of the recipients |
| attributeNames | String[ ][ ] | Field names of the fields (e.g., firstname, lastname etc.) that are to be updated |
| attributeValues | String[ ][ ] | New values for the attributes/fields defined with **attributeNames**<br><br>Each entry must be formatted according to the [formatting rules](🔗). |
**Return values**
** **-
**Code structure**