ACC97: IPF When Using Execute Method with dbFailOnError
ID: Q180348
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The information in this article applies to:
SYMPTOMS
Advanced: Requires expert coding, interoperability, and multiuser skills.
When you run a Visual Basic for Applications procedure that uses the
Execute method to update data in a Microsoft SQL Server ODBC data source,
you may receive the following error message.
In Microsoft Windows NT 4.0
An application error has occurred and an application error log is
being generated.
MSACCESS.exe
Exception: access violation (0xc0000005)
In Microsoft Windows 95
This program has performed an illegal operation and will be shut
down.
When you click Details, you see the following message:
MSACCESS caused an invalid page fault in module KERNEL32.DLL.
However, the action originated by the Execute method is completed
successfully.
CAUSE
You receive this error message when all of the following conditions are
true:
- You are using the Execute method with the constant dbFailOnError.
- You are updating a field with data that consists of a string longer
than 60 characters. The length of the string that causes the error can
vary, and you may receive the error when updating the field with a
string longer than 45 characters.
WORKAROUND
Create a temporary SQL pass-through query in your Visual Basic for
Applications procedure. Concatenate the text string with which you want to
update the field into the SQL statement; set the SQL property of the
QueryDef to the SQL statement. You can then use the Execute method of the
QueryDef with the constant dbFailOnError. The following example
demonstrates how to implement the procedure:
- Repeat steps 1-7 from the "Steps to Reproduce Behavior" section later in
this article. If you link to the table in step 7, you can open the table
later to verify that the procedure worked properly.
- Open a new module and type the following code:
Function PassThruUpdate(strUpdateData As String)
Dim db As Database
Dim qd As QueryDef
Dim strSQLString As String
On Error GoTo Err_PassThruUpdate
Set db = CurrentDb
Set qd = db.CreateQueryDef("")
' Modify the connect string in the following line
' to reflect the ODBC data source you are using.
qd.Connect = "ODBC;DSN=sqltest;UID=sa;PWD=;DATABASE=pubs"
strSQLString = "UPDATE tbltoSQL SET StringTest = '"
strSQLString = strSQLString & strUpdateData
strSQLString = strSQLString & "' WHERE id = 'a'"
qd.ReturnsRecords = False
qd.SQL = strSQLString
qd.Execute dbFailOnError
db.Close
Exit_PassThruUpdate:
Exit Function
Err_PassThruUpdate:
MsgBox CStr(Err) & " " & Err.Description
Resume Exit_PassThruUpdate
End Function
- To test the sample function, type the following line in the Debug
window, and then press ENTER:
?PassThruUpdate(string(75,"X"))
Note that although you are using the Execute method with the constant
dbFailOnError, and the string with which you are updating the field is
longer than 60 characters, you do not receive the error described in
the "Symptoms" section.
MORE INFORMATION
Steps to Reproduce Behavior
- Start Microsoft Access 97 and create a new blank database.
- Create the following table:
Table: tblToSQL
----------------------
Field Name: ID
Data Type: Text
Field Size: 2
Field Name: StringTest
Data Type: Text
Field Size: 100
Table Properties: tblToSQL
--------------------------
PrimaryKey: ID
- Save the table as tblToSQL and open it in Datasheet view.
- Enter the following data into the tblToSQL table:
ID FullName
-- --------
a aaa
b bbb
- Close the table.
- Export the table to a Microsoft SQL Server database.
- Link to the table that you just exported. When prompted to select a
unique record identifier, click ID, and then click OK.
- Open a new module and type the following code:
Function TestExecute(intUpdateLength As Integer)
Dim db As Database
Dim strSQLString As String
Dim strUpdateString As String
strUpdateString = String(intUpdateLength, "X")
strSQLString = "UPDATE dbo_tblToSQL SET StringTest = '" & _
strUpdateString
strSQLString = strSQLString & "' WHERE id = 'a';"
Set db = CurrentDb
db.Execute strSQLString, dbFailOnError
db.Close
End Function
- On the Debug menu, click Compile And Save All Modules. When prompted
to save the module, type modTest and
then click OK.
- Type the following line in the Debug window, and then press ENTER:
?TestExecute(60)
Note that you receive the error message described in the "Symptoms"
section.
REFERENCES
For more information about the Execute method, search the Help Index for
"Execute method," and then display the "Execute Method (DAO)" topic.
Additional query words:
Watson
Keywords : EvnGpf MdlGnrl MdlProb
Version : WINDOWS:97
Platform : WINDOWS
Issue type : kbbug