sp_indexoption is not supported for XML Index and the table has an XML index on it. Use ALTER INDEX instead to set the option for ALL the indexes.

Error Message:
Msg 15391, Level 11, State 1, Procedure sp_indexoption, Line 79
sp_indexoption is not supported for XML Index and the table has an XML index on it. Use ALTER INDEX instead to set the option for ALL the indexes.

Severity level:
11.

Description:
This error message appears when you try to run the sp_indexoption stored procedure against a table that has an XML index defined on it.

Consequences:
The T-SQL statement can be parsed, but causes the error at runtime.

Resolution:
Errors of the Severity Level 11 are generated by the user and are corrigible by the user. The statement cannot be executed this way. XML indices are invalid as arguments for sp_indexoption.

Versions:
This error message was introduced with SQL Server 2005.

Example(s):
USE tempdb;
GO
IF OBJECT_ID('tempdb..#t') > 0
 DROP TABLE #t
GO
CREATE TABLE #t
(
 id INT PRIMARY KEY NOT NULL,
 c1 XML
)
GO
CREATE INDEX IX_t_id ON #t(id)
GO
CREATE PRIMARY XML INDEX IX_XML_t_c1
    ON #t(c1);
GO
EXEC sp_indexoption N'dbo.#t', N'disallowpagelocks', TRUE;

Remarks:
In the above example we try to run sp_indexoption against the table #t. Because #t has a XML index IX_XML_t_c1 defined on it, the error is raised.