Handling Lost Connection From The Backend?

Feb 5, 2008

I have a Access FE linked to a Access BE on a computer. Whenever the user of that computer shuts off, the Access FE handles this in worst way possible: It spews a zillion dialog warning of 'disk or network not found' before my error handler even takes over.

Has anybody come up with a way to catch such situation?

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Lost Connection Or Someone Is Using The Link.

Oct 29, 2007

these are two issues that are making some problems to me.in a few words i will make a description.there is a html that contains data.this data is updateable.i have made a link to my excel.i need to add somethings before they come to access.i have made a link in an access getting all data in it.i have made a update query to store data in another table so i will not lose previous data.all excel and access work opened.so at start it works fine.after 1-2 hours or maybe more a alert display and eather there is lost connection or it says that another user is using the data or about permissions.i then have to restart my pc so it can work again.all is working on windows xpsp2 and office 2003.
please send reply if anyone knows something.thank you.

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Error Accessing File. Network Connection May Have Been Lost

May 20, 2005

I think the damage to my database is not recoverable, but i'm still hoping.
My computer crashed when I was working on my dtabase and after restart the db is not working anymore :( If I try to do something, anything (!!!) all I got is an error message: "Error accessing file. Network connection may have been lost." But the db is on my computer, I don't use it over the network.
What can I do to make it working again?
Thanx!

Attila

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General :: Detect Broken Backend Connection At Startup

Feb 17, 2015

I have a split Access 2010 database. If the backend file is not accessible (for instance, if our shared folder connection is broken), I get no warning message at all when opening the front end. Just the home screen you would get when launching access from the Start menu. I was thinking of adding some VBA code to my startup form to give users a warning that there is a connection problem, but Access won't even load the startup form.

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Modules & VBA :: Refresh Linked Tables When Connection Lost Without Closing Access Database

Sep 4, 2014

I have MDB database linked to SQL SERVER through VPN connection.I created links to the sql server Links are dsnless..Everything works fine but when I lost VPN connection or sql connection has been broken I can't refresh links to the tables.I receive message 3146 sql connection failed..I must close database and start again...

I tried different methods like ado,dao, and vba docmd.transferdatabase,aclink... but no success, table cant be relinked.

Only way I can relink is to change ip adress in conn.string

E.g. 192.124.0.2 (1st ip- router server ip) and after connection failed i can use 192.124.0.32 (2nd ip - server local ip) and that's it if i lost connection for the 3rd time... i must restart application.

It seems that access database keep the previous connection..how to reset or drop database connection to the sql server and refresh links to the tables with vba code without closing access database...

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Please Help!! "Error Accessing File. Network Connection May Have Been Lost"

Oct 12, 2007

Hi all,

I have been developing Access 2K applications. Lately, every time I click a command button on a form or even open the code window for a form, I got this repetitive error message. I even create BLANK Access db and re-import all objects or create brand new form and copy the control designs/code from the error one to the new one. The new db or the new form still have the same ERROR, which is as follow :

"The expression On Click you entered as the event property setting produced the following error: Error accessing file. Network connection may have been lost.
*The expression may not result in the name of a macro, the name of a user-defined function, or [Event Procedure].
*There may have been an error evaluation the function, event, or macro."

Please help! Thanks so much for your suggestions/
Have a great weekend,

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How To Establish The Connection Between Ms-Access2000 & Oracle Using DAO Connection?

Sep 26, 2005

Dear Guys,
How to Establish the connection between Ms-Access2000 & Oracle using DAO Connection through Code?.

I created one table in Oracle and I created User-DSN in ODBC.
I linked that oracle table into Ms-Access MDB using Link table option in ms-Access.

Now, Whenever I open that mdb, we need to establish the ODBC connectivity automatically through code (I mean, we need to refresh automatically).

I need to hardcode all the information in the Ms-Access code.

My User DSN Name: abcd
Oracle Database Name: abcd
Schema Name(User Name): abcd
password: abcd

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DNS Connection --> DNSless Connection

Jan 9, 2005

Right Ok i hope i can get some help cause im absolutely stumped..
i cant get my login page to work since moving it from my PWS(iis on xp) DSN connection
to a 24/7 server on the net with DSNless connection
here is the code for the include file "conntopwd.asp"
http://www.pritchardwebdesign.pwp.blueyonder.co.uk/conntopwd.txt
the username and path has been changed slightly for security purposes,
and the code for the login page which attempts to access the database is here
http://www.pritchardwebdesign.pwp.blueyonder.co.uk/login.txt
the connection has been tested by one of the tech support guys at brinkster and he told me it was ok,
the problem was the way that the data is called from the data base is wrong ..
The tech support guy said that it was this line that was causing the problem..
MM_rsUser.ActiveConnection = MM_conntopwd_STRING
Any help would be much appreciated as im stuck for now..

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Error Handling

Nov 23, 2006

I have recently upsized an Access database to SQL Server. The .adp is for the most part working fine.

However, when an end user tries to create a duplicate record in one of the Primary key columns of a Form he gets a SQL Server error message as follows:

"Violation of Primary Key constraint. Cannot insert duplicate key in object myTable".

This is obviously not a very useful error message. What would be the best way to ensure that a more useful error message is returned?

I have considered adding code to the "After_Update" event of the cell in question. This however seems long winded. Is there an easier option?

Thanks
Kabir

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Help With Text Handling

Dec 3, 2006

Hi

Have the following code that works on Access 2000

Dim myForenameBefore As String
Dim myForenameAfter As String
With CurrentDb.OpenRecordset("Names", dbOpenDynaset)
Do Until .EOF
myForenameBefore = .Fields("Forename")
myForenameAfter = Replace(.Fields("Forename"), "Elizh", "Elizabeth")
MsgBox myForenameBefore & " " & myForenameAfter
.MoveNext
Loop
.Close
End With

So that I can replace any abbreviated names in a table, however I cannot figure out how to put the value of myForenameAfter back into the table replacing the existing data.
Must be particularly thick today

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Message Handling

Oct 18, 2005

I have a form with a number of check boxes. Clicking on the checkboxes carries out a count function which is then displayed. If the count goes above 20 then a message box is displayed telling the user of it. My problem is that once the number is above 20, the message box diplays everytime. I want it to display just once, regardless of how high the number goes. The checkboxes can be ticked in any order.

At present i'm using

On click

If Me.Text1 > 20 Then
Msgbox "The number is graeter than 20"
End If

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Error Handling

May 12, 2005

Hi all

The following code only half works. I want to stop an ugly error occuring when primary keys are duplicated. In the following code the error handler picks up and displays a simple message when a user attempts to add duplicate values. BUT if the users adds a record, the record is successfully added followed with the same error message. I think I've put the error handler in the wrong place, but I can't figure out where it should go. Any ideas are much appreciated.

Damon

Private Sub cmdUpdateGoMaths_Click()
'update Go Maths

On Error GoTo error

Dim adors As ADODB.Recordset
Dim sSQL As String

' sSQL = "Select * from datGoMaths;"

' Set rsADO = New ADODB.Recordset
' rsADO.Open sSQL, CurrentProject.Connection, adOpenKeyset, adLockBatchOptimistic

sSQL = "dataGoMaths"
Set adors = New ADODB.Recordset
adors.Open sSQL, CurrentProject.Connection, adOpenDynamic, adLockOptimistic

With adors

.AddNew
.Fields("EQID") = Me.lstGoMathsStudentName
.Fields("IDGoMaths") = Me.lstUnitNo.Column(0)
.Fields("Score") = Me.txtScore

.Update

End With
Set adors = Nothing
MsgBox Me.txtStudentName & " Added"

Me.lstGoMathsStudentName = ""
Me.txtScore = ""

error:
MsgBox "test"
DoCmd.CancelEvent

End Sub

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Error Handling With Macro

Apr 30, 2006

I currently have a macro that sets the value of several fields on a "lost focus " event; however there is an error that I would like access to ignore, is there any way to have this macro process this function "On Error Resume Next" ?

Carbo

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Xml Formatting And Handling Of Keys

Jun 29, 2006

When I export my access database to XML I noticed that the XML elements for the table keys contain the key numbers themselves, not the table name (or a chosen field in the table). For an application I am working on, this presents a problem. What I have is:

One table called 'Process' that looks like:

Process instance_idSystem instance IdProcess name
26 24 Two_thread_process


I have another table called "Thread":

Thread _instance_id Process instance_Id Thread instance name
30 26 T1_instance


XML export looks like:

- <process_INSTANCE>
<process_instance_id>26</process_instance_id>
<system_instance_name_id>24</system_instance_name_id>
<process_instance_name>two_thread_process</process_instance_name>
- <thread_INSTANCE>
<Thread_instance_id>30</Thread_instance_id>
<process_instance_id>26</process_instance_id>
<thread_instance_name>T1_instance</thread_instance_name>
</thread_INSTANCE>
</process_INSTANCE>

What I would *like * the XML to look like is:

- <process_INSTANCE>
<process_instance_id>26</process_instance_id>
<system_instance_name_id>24</system_instance_name_id>
<process_instance_name>two_thread_process</process_instance_name>
- <thread_INSTANCE>
<Thread_instance_id>30</Thread_instance_id>
<process_instance_id>two_thread_process</process_instance_id> (**name instead of key here**)
<thread_instance_name>T1_instance</thread_instance_name>
<thread_instance_type>periodic</thread_instance_type>
</thread_INSTANCE>

The access XML export writes out the key values as they appear in the tables. What I would like is for it to put in the ‘process instance name’ instead of the key that points back to the base (process) field.
Any pointers on how I could do this?

Thanks
John

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Recommended Handling Of Images

Apr 12, 2007

Does anyone have a recommended way to deal with images (ie. linked to file, OLE object embedded, others I'm not aware of)???

I have a report which summarizes the history of a project. In this report I have a subreport which has task information. As a user enters task information they have the option of associating pictures with the task (ie. prototypes, design images, test setup, etc).

So my data structure is based on:
- many projects
- each project can have many tasks
- each task can have many pictures

My report for each project lists some typical project information and a subreport shows the task details associated with that project along with as many images that are associated with it.

My current system links to files on a network to avoid database size. This works well for storage and form use, until I try to print or preview a report. Then some of my pictures don't show up and I get a message that says images may be too large. My report could conceivably have up to 100 images, but I'm images stop showing up when I have around 15-20 pictures. Pictures files are typically 300 KB.

Is there a better way to show images on a report?????

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On Error 2427 Handling

Mar 2, 2005

I have a form where the user enters a year then clicks on a command button to open a report.

If a year that there is no data for is entered an error 2427 occurs.

I have tried putting the following code in the on error event of the form with now success:

Select Case DataErr

Case 2427

MsgBox "There are no records for the year you entered" & Chr(13) & "Make sure you entered the correct year”

Response = acDataErrContinue
Case Else
Response = acDataErrDisplay

End Select


Does anyone know how to trap this error?

Thanks

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Handling Address Details

Apr 25, 2006

Hi All,
I am rather new to this and I must admit I am getting everything completely wrapped around my head!

I am developing a database that stores technical support requests received and their solutions. I have three main tables :

Problem - stores all the details of the problems received

Client - stores the address details of the client which is then associated with the 'Problem' table

Company - stores the name of the company which is then associated with the 'Client' table. This is a separate table as different clients can work for the same company.

At present, I have a 'problem data entry' form in which I enter all the details of the problem. At the top there is a section where I can do a search for a particular client and company and the details appear in the respective text boxs on the 'problem data entry' form. If the client does not exist, I have a button that I use to open another form which allows the entry of the new client's details ('New Client'). The user can choose which company this client works for by using a combobox. If the company is not already in the database, I have another button for opening a 'New Company' form!

Its all a little convoluted and it does not work particularly well to be honest. When I add a new company, I need to move forward a record and then back in the 'New Company' form in order that the new company information is saved correctly.

The company selection combobox in the form 'New Client' is then updated with the new company name BUT I need to actually open the combobox and select the company name myself for it to work properly! Once again I also need to move forward one record and then back again in order to properly save all the information before I can close the form.

What would be nice is to do a search for the the company in the combobox on the 'New Client' form, if the company is not found, it automatically adds the company to the database whilst updating all the necessary links. Hence getting rid of the 'New Company' form. I would also like to get rid of the problem of having to move forwards a record and then back again.

Any ideas? I find my method to be rather poor, there must be a simpler way of doing this!

Many Thanks,
Lee

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Error Handling Problem

Aug 8, 2006

On a form i have a textbox to enter a date and multiple command buttons to open other forms.
After entering a date value, followed by either a tab or clicking on one of the command buttons, i want to validate the entered date value. If the date is invalid i want to display an error message and the cursor positioned on the textbox field.

The LostFocus event of the textbox is as follows:

Private Sub txtDateField_LostFocus()
If Not IsDate(txtDateField.Value) Then
MsgBox "Date invalid."
txtDateField.SetFocus
End If
End Sub

If entering an invalid date is followed by a tab, the error is displayed but the cursor is not positioned on the textbox field.
If entering an invalid date is followed by clicking on one of the command buttons, the error is displayed but the expected form is opened.
How to position the cursor appropriate and how to prevent opening the form?

Who helps?

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Error Handling Problem

Aug 8, 2006

On a form i have a textbox to enter a date and multiple command buttons to open other forms. After entering a date, either followed by a tab or clicking on one of the command buttons, i want the date validated. In case of an invalid date an error must be displayed and the cursor positioned to the textbox.
Therefor the LostFocus event is as follows:

Private Sub txtDateField_LostFocus()
If Not IsDate(txtDateField.Value) Then
MsgBox "Date invalid."
txtDateField.SetFocus
End If
End Sub

If entering an invalid date is followed by a tab the error is displayed but the cursor is not positioned to the textbox.
If entering an invalid date is followed by clicking on one of the command buttons the error is displayed but a form is opened.
How to position the cursor correctly and prevent opening of a form?

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Error-Handling Help Needed

Oct 25, 2006

How do you do an Access/VBE split screen? I want to be able to watch the code execute as I enter data into the form.

I have redesigned a database, essentially building a new one from scratch. I have all of the forms created and they are working beautifully. :) Now, I'm error-handling to create user-friendly messages. I have a superb Access programming book, but it only briefly mentions error handling and doesn't describe at all how to do it. Most of my forms are pretty simple, and I've been able to complete all of the error-handling tasks using the Form Error event as well as coding other events with the error message number. However, the main form is complex and includes a function in a standard code module and a custom sub routine.


TIA!
AA

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Err Handling 'Invalid Use Of Null'

Sep 13, 2004

I have a button on a Tab that opens an input form to allow user to add a records. The record is indexed to relevant option from the combo bos on main form, so if no choice is made and user clicks add button megbox 'Invalid Use of Null' pops up. However I can't seem to prevent it, even when I've removed the code completely from the method/function. What's going on there? I just want the message box to say, please make a selection or something. Any ideas?

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Date Data Handling

Nov 1, 2004

I have written the following Function as part of an Access program:

Public Function TotalWl() As Long
Dim sqlWL As String
Dim rsWL As Recordset
Dim dbWL As Database
Dim sendlDate As Date
Set dbWL = CurrentDb
sqlWL = "SELECT compul FROM qryStatisticsWL WHERE sendDate between 01/09/2004 and 30/10/2004 " 'this is all written on one line because I do not know how to split it in more than 'one lines
Set rsWL = dbWL.OpenRecordset(sqlWL, dbOpenSnapshot)
If Not rsWL.EOF Then
rsWL.MoveLast
TotalWl = rsWL.RecordCount
End If
End Function

When I call this function the result is always 0. The program does not like :
WHERE sendDate between 01/09/2004 and 30/10/2004
I have tried: WHERE sendDate >= 01/09/2004 and sendDate <= 30/10/2004
also: WHERE sendDate >= 01/09/2004 and <= 30/10/2004
I also used single quotes, like '01/09/2004 '
But nothing solved the problem. By the way, thee are data between these two dates.
Any suggestions how to proceed?

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Handling File Attachments

Aug 19, 2005

I have a database for which the user can "attach" supporting files. Currently I handle this by putting a button on the form. The button opens the folder related to the current record via windows explorer. The user is then free to open any file contained, or drag and drop new files if needed. It works reasonably well.

But there is no indication when you look at the form if there are any files attached or not.

First, if anyone can point me to a better way to handle this, (it bugs me that there are thousands of folders being created to each hold a file or two), I would appreciate that. The typical attachment is a message dragged and dropped out of Outlook.

Second, assuming I continue doing things this way, I am thinking I would like to add a listbox to the form. When the form moves to a new record, I would populate the list box with the name of any files found. I know how to do that, but to which event would I be attaching this code?

Thanks,
David

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Handling Filters In A Form

Oct 19, 2006

hi

The database XXXXX_20061018.mdb contains the form Frm_XXXXXX.
Currently this form does not show data after it has been opened.
infact of the Me.FilterOn = False.
so please give me some idea how to solve this problem

thanking you

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Handling Null Value In Parameter Query

Jan 16, 2006

I have to give a three paramters queries. But i have to handle null responses also in such a way that in one parameter or two parameters i don't want to enter value and the result should bring all possible values with the parameters I entered

Like customer, status and order number in different fields

when i don't enter order number the result should bring all values in status and customer

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Error Handling When Report Cancelled

Oct 12, 2007

Just a quick one.

I'm not usre how to handle the error when cancelling a report. so when I hit a control to bring up a report and say I cancel it before I put in any parameters for example I get the dialog box " runtime error" "OpenReport action was cancelled" etc.

Could anyone help me on how to handle this with VBA so that it's at least a more user friendly dialog box?

thanks

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