How can a Knowledge Article be published using the SOAP API?

Question

I'm attempting to use Salesforce's SOAP API to publish a knowledge article, but when I set the PublishStatus to Online, I get the following error: Unable to create/update fields: PublishStatus. Please check the security settings of this field and verify that it is read/write for your profile or permission set.

[errors] => Array
    (
        [0] => stdClass Object
            (
                [fields] => Array
                    (
                        [0] => PublishStatus
                    )

                [message] => Unable to create/update fields: PublishStatus. Please check the security settings of this field and verify that it is read/write for your profile or permission set.
                [statusCode] => INVALID_FIELD_FOR_INSERT_UPDATE
            )

    )

Checking the "Knowledge Field-Level Security for profile" for the account I'm using Salesforce with, "Publish Status" has Read Access and Edit Access both checked. How do I alter the Publish Status field on a Knowledge Article with this error?

Answer 1

According to a Salesforce support technician, it is not possible to to update the PublishStatus field via the API at this time.

Answer 2

In KnowledgeArticleVersion.PublishStatus it says:

A user must have the “Manage Articles” permission enabled to use Online.

Does your user have that permission to move from Draft to Online status? A quick check might be to see if the same user can publish the aritcle via the standard UI.