Symptoms
When you use the DB-Library API server cursors, if the table name parameter that is passed to the sp_cursor stored procedure includes a bracketed identifier, the execution of sp_cursor fails with the following error message:

SQL Server message 16933, state 2, severity 16:
The cursor does not include the table being modified or the table is not updatable through the cursor.Refer to the “More Information” section of this article for an example and additional symptoms.
Resolution
SQL Server is unable to successfully parse the bracketed table name with spaces.
DB-Library binds the table name as a SQLCHAR data type, which has a fixed length of 255 characters (the maximum length of this data type). The buffer holds the table name, including the brackets, with the remaining bytes padded with spaces.