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Q113510: BUG: SQLFreeStmt After SQLExecute/SQLExecDirect May Cause GPF

Article: Q113510
Product(s): Open Database Connectivity (ODBC)
Version(s): WINDOWS:1.0
Operating System(s): 
Keyword(s): kbBug kbISS
Last Modified: 27-JUL-2001

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The information in this article applies to:

- Microsoft Open Database Connectivity, version 1.0 
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BUG# ODBCDBASE: 2062 (1.01.1928)

SYMPTOMS
========

On certain Btrieve Tables, the following sequence of operations (or equivalent)
can generate a general protection fault (GP fault) in BTRV110.DLL:

1. Allocate a Env, Hdbc, and Stmt handle using SQLAllocEnv, SQLAllocConnect, and
  SQLAllocStmt respectively or an equivalent sequence of calls to prepare to
  execute a SQL statement.

2. Execute SQLExecDirect or SQLExecute to execute a selection query (select *
  from <tablename>).

3. A subsequent call to SQLFreeStmt with fOption = SQL_CLOSE.

The exact message of the error generated is:

  <Application name> caused a general protection fault in module
  BTRV110.DLL at 0011:0B7A.

NOTE: The conditions under which this can happen are highly dependent on the
combination of specific data in certain tables and the structure of the ddf
files.

WORKAROUND
==========

Try copying the data out and moving into another table. Run your query against
the new table.

STATUS
======

Microsoft has confirmed this to be a problem in ODBC Btrieve Driver version
1.01.1928. We are researching this problem and will post new information here in
the Microsoft Knowledge Base as it becomes available.

Additional query words: 1.01.1928 DDD VB Access ODBC

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Keywords          : kbBug kbISS 
Technology        : kbAudDeveloper kbODBCSearch kbODBC100
Version           : WINDOWS:1.0
Issue type        : kbbug

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