Cannot create plan guide '%.*ls' because its name is invalid. Plan guide name cannot begin with a '#' character.

Error Message:
Msg 10528, Level 16, State 1, Procedure sp_create_plan_guide, Line 15
Cannot create plan guide ‘%.*ls’ because its name is invalid. Plan guide name cannot begin with a ‘#’ character.

Severity level:
16.

Description:
This error message appears when you try to create a plan guide with an invalid name.

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

Resolution:
Errors of the Severity Level 16 are generated by the user and can be fixed by the SQL Server user. The statement cannot be executed this way. You must provide a valid name.

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

Example(s):
IF OBJECT_ID (‘dbo.t’) IS NOT NULL
    DROP TABLE dbo.t;
GO

CREATE TABLE dbo.t
(
    c1 int
);
GO

IF OBJECT_ID (‘dbo.p’) IS NOT NULL
    DROP PROCEDURE dbo.p;
GO

CREATE PROCEDURE dbo.p
    @p int
AS
SELECT
    c1
FROM
    dbo.t
WHERE
    c1 = @p;
GO

EXEC sp_create_plan_guide
    @name = ‘#Guide1’,
    @stmt = ‘SELECT
                c1
            FROM
                dbo.t
            WHERE
                c1 = @p’,
    @type = ‘OBJECT’,
    @module_or_batch = ‘dbo.p’,
    @params = NULL,
    @hints = ‘OPTION (OPTIMIZE FOR (@p = 1))’;

EXEC sp_control_plan_guide ‘DROP’, ‘Guide1’;

Remarks:
In the above example we try to create a planguide. Because we provide a name starting with a #, the error is raised.

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