Microsoft KB Archive/209943

= ACC2000: Run-Time Error '3027' Using ODBCDirect to Open RecordSet =

Article ID: 209943

Article Last Modified on 1/26/2005

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APPLIES TO


 * Microsoft Visual Basic for Applications 6.0
 * Microsoft Access 2000 Standard Edition

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This article was previously published under Q209943



Advanced: Requires expert coding, interoperability, and multiuser skills.

This article applies only to a Microsoft Access database (.mdb).



SYMPTOMS
When you use an ODBCDirect connection to open a recordset, you may receive the following error message if you use the .AddNew method:

Run-time Error '3027': Can't update. Database or object is read-only.



CAUSE
This behavior can occur because, by default, Microsoft Access opens a read-only recordset in an ODBCDirect workspace. The read-only recordset gives better performance when you scroll through the recordset.



RESOLUTION
If you want to be able to modify a recordset in an ODBCDirect workspace, you must specify a LockEdits argument with the OpenRecordset method. The full syntax for the OpenRecordset method is as follows: Set recordset=object.OpenRecordset(source, type, options, lockedits) You create an editable recordset when you use one of the following constants in the LockEdits argument of the OpenRecordset method:

dbOptimistic

dbPessimistic

dbOptimisticValue

dbOptimisticBatch

For example, the following line of sample code opens an editable recordset that uses optimistic record locking: Set RS = conPubs.OpenRecordset("Authors",dbOpenDynamic,0,dbOptimistic) NOTE: You must supply a zero (0) for the Options argument.



Steps to Reproduce Behavior
The following example assumes that you have an Open Database Connectivity (ODBC) data source that opens the Pubs database in Microsoft SQL Server.  Start Access and open the sample database Northwind.mdb.  Create a module, and then type the following procedure: NOTE: When you use the Visual Basic Editor from within other Microsoft Office 2000 programs, you must first ensure that the Microsoft DAO 3.6 object library is included in your References. Sub ConnectAndAddRecords(UID as String, DSN as String, _                        Optional PWD as String) Dim wrkODBC As Workspace Dim conPubs As Connection Dim rstTmp As Recordset

' Create an ODBCDirect workspace. Set wrkODBC = CreateWorkspace _ ("NewODBCWorkspace", "admin", "", dbUseODBC)

' Open a connection to an ODBC data source. Set conPubs = wrkODBC.OpenConnection("Connection1", _      dbDriverNoPrompt,,"ODBC;DATABASE=pubs;UID=" & UID _       & ";PWD=" & PWD & ";DSN=" & DSN)

' Open a recordset which is read-only by default. Set rstTmp = conPubs.OpenRecordset("Authors", dbOpenDynamic)

rstTmp.AddNew rstTmp!au_id = "111-11-1111" rstTmp!au_lname = "Dickens" rstTmp!au_fname = "Charles" rstTmp!Contract = 0 rstTmp.Update rstTmp.Close conPubs.Close wrkODBC.Close End Sub  To test this procedure, type the following line in the Immediate window, and then press ENTER: NOTE: Substitute your own username, ODBC data source name and password for the UID, DSN, and optional Password arguments in the following example:

ConnectAndAddRecords "UID","DSN","Password"



Note that the code fails on the rstTmp.AddNew line with the following error message:

Run-time Error '3027': Cannot update. Database or object is read-only.

