This article was previously published under Q178650
Novice: Requires knowledge of the user interface on single-user computers.
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SYMPTOMS
When you try to run a large, complex, select query or a large action query
such as a make-table query on a dual processor computer, the query does not
finish processing, and Microsoft Access stops responding (hangs). If you
monitor the system, you see that the processor time drops to between 0% and
1% shortly after the query begins running. However, you can press
CTRL+BREAK to terminate the query, and Microsoft Access functions normally.
This behavior also occurs if you try to import a delimited text file that
is 70 megabytes (MB) or larger.
You can run the same query or import the same text file on a single
processor computer.
There are two resolutions and one workaround to this problem.
Install Microsoft Office 97 Service Release 2
Obtain and install the Microsoft Office 97 Service Release 2. For more information about getting this Service Release, see the following
article in the Microsoft Knowledge Base:
151261 (http://support.microsoft.com/kb/151261/EN-US/) OFF97: How to Obtain and Install MS Office 97 SR-2
Install Microsoft Jet 3.51
Obtain Jet35sp3.exe from the Microsoft Web site; this file contains
the updated version 3.51 of the Microsoft Jet database engine. For
information about how to obtain Microsoft Jet 3.51, see the
following article in the Microsoft Knowledge Base:
172733 (http://support.microsoft.com/kb/172733/EN-US/) ACC97: Updated Version of Microsoft Jet 3.5 Available for Download
To work around this problem, use only one processor if you intend to run large, complex queries or import large text files on a dual processor computer. Follow either of these methods to use only one processor.
Method 1
1.
Press CTRL+ALT+DEL, and then click Task Manager.
2.
Click the Processes tab.
3.
Right-click MsAccess.exe, and then click Set Affinity.
4.
Click to clear either CPU0 or CPU1.
5.
Click OK, and then close Task Manager.
Method 2
1.
Create a new database.
2.
Create a new form.
3.
Add a command button named Command0.
4.
Click Code on the View menu.
5.
Type the following code:
Option Compare Database
Option Explicit
Private Declare Function SetProcessAffinityMask Lib "kernel32" _
(ByVal hProcess As Long, ByVal dwProcessAffinityMask As Long) As Long
Private Declare Function GetProcessAffinityMask Lib "kernel32" _
(ByVal hProcess As Long, lpProcessAffinityMask As Long, _
lpSystemAffinityMask As Long) As Long
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
Private Declare Function OpenProcess Lib "kernel32" _
(ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, _
ByVal dwProcessId As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" _
(ByVal hObject As Long) As Long
Private Declare Function GetWindowThreadProcessId Lib "user32" _
(ByVal hwnd As Long, lpdwProcessId As Long) As Long
Private Const PROCESS_SET_INFORMATION = (&H200&)
Private Const PROCESS_QUERY_INFORMATION = (&H400&)
Dim a As Object
Private Sub Command0_Click()
Dim idThread As Long
Dim idProcess As Long
Dim ProcessAffinity As Long
Dim SystemAffinity As Long
Dim lRet As Long
Dim hProcess As Long
idProcess = Shell("C:\Program Files\Microsoft" & _
" Office\Office\MSACCESS.EXE" & _
" C:\Program Files\Microsoft Office\Office\Samples\Northwind.mdb", _
vbMaximizedFocus)
If idProcess Then
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION Or _
PROCESS_SET_INFORMATION, False, idProcess)
lRet = GetProcessAffinityMask(hProcess, ProcessAffinity, _
SystemAffinity)
ProcessAffinity = 1 ' this sets the process to only run on CPU 0
' for CPU 1 only use 2 and for CPUs 1 & 2 use 3
lRet = SetProcessAffinityMask(hProcess, ProcessAffinity)
CloseHandle (hProcess)
End If
End Sub
6.
Save the form, and then open the form in Form view.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
This problem was corrected in Microsoft Jet 3.51.
For additional information about how to obtain Microsoft Jet Database Engine 3.51, click the article number below
to view the article in the Microsoft Knowledge Base:
172733 (http://support.microsoft.com/kb/172733/EN-US/) Updated Version of Microsoft Jet 3.5 Available for Download
Start Microsoft Access on a dual processor computer and open the sample database Northwind.mdb.
2.
Create a new query in Design view.
3.
In the Show Table dialog box, click the Tables tab and select the
Orders table.
4.
Click Add twice so that the Orders table is added to the query twice,
and then click Close. Do not create a join between the tables.
5.
Drag the asterisk (*) from the Orders table into the query grid, and
then drag OrderID from Orders_1 (the second instance of the Orders
table) into the query grid.
6.
On the Query menu, click Run. The query should return over 688,000
records.
7.
On the View menu, click Design View.
8.
On the Query menu, click Make-Table Query.
9.
In the Make Table dialog box, type qryTestTable and click OK.
10.
On the Query menu, click Run. Note that Microsoft Access stops
responding before the query finishes processing.
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