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FIX: REPAIR_DB Option May Remove Encryption from Access 2000 Database

View products that this article applies to.

This article was previously published under Q298145

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If you use the SQLConfigDataSource ODBC API call with the REPAIR_DB option on an encrypted Microsoft Access database file, the database is properly repaired, but the encryption is removed.

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This is a problem in the Microsoft Jet ODBC Drivers (Odbcjt32.dll) that ship with Microsoft Data Access Components (MDAC) 2.5 Service Pack 2 and earlier.

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To resolve this problem, obtain the latest service pack for Microsoft MDAC 2.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
293312� INFO: How to Obtain the Latest MDAC 2.5 Service Pack
The English version of this fix should have the following file attributes or later:
   Date        Version      Size            File name      Platform
   12/04/2001  4.0.7412.0   270,608 bytes   Odbcjt32.dll   x86

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To work around this problem, use the CDaoWorkspace::RepairDatabase function to repair the database.

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft MDAC 2.5 Service Pack 3.

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More information

The following code reproduces the problem:
void Repair(BOOL bEncrypt)
	CString strDBQ = "d:\\NWind.mdb", strSystemDB = "d:\\System.mdw";
	CString strAttributes;
	strAttributes += "REPAIR_DB=";
	strAttributes += strDBQ;
	if (bEncrypt)
		strAttributes += " ENCRYPT";  // This additional keyword is an optimistic try and has no effect!!
	strAttributes += "|";
	strAttributes += "SYSTEMDB=";
	strAttributes += strSystemDB;
	strAttributes += "|";
	strAttributes += "EXCLUSIVE=TRUE";
	strAttributes += "|";
	strAttributes += "|";

	// Exchange pipes against nulls so the command is interpreted correctly.
	for (int i = 0; i < strAttributes.GetLength(); i++)
		if (strAttributes[i] == '|')
			strAttributes.SetAt(i, char(0));

	BOOL b = SQLConfigDataSource(NULL, ODBC_CONFIG_SYS_DSN, "Microsoft Access Driver (*.mdb)",
		(LPCSTR) strAttributes);
	if (!b)
		CString strErrorMsg;
		for (int i = 1; i <= 8; i++)
			WORD cbErrorMsg;
			DWORD dwErrorCode;
			RETCODE r = SQLInstallerError(i, &dwErrorCode, strErrorMsg.GetBuffer(100), 100, &cbErrorMsg);
			if (r == SQL_NO_DATA)
			TRACE("Rec: %d: %d, %x (%s)\n", i, r, dwErrorCode, (const char *) strErrorMsg);

		AfxMessageBox("Repair failed!");
		AfxMessageBox("Repair succeeded!");

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Keywords: kbhotfixserver, kbqfe, kbmdac250sp3fix, kbjet, kbmdacnosweep, kbprb, KB298145

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Article Info
Article ID : 298145
Revision : 5
Created on : 9/26/2005
Published on : 9/26/2005
Exists online : False
Views : 160