Gustav Brock
Gustav at cactus.dk
Tue Aug 8 14:00:36 CDT 2006
Hi Rocky
That sounds a bit strange, also regarding the exe-name.
Here's a function that may help you:
<code>
Public Function VerifyReferences(ByVal booErrorDisplay As Boolean) As Boolean
' Verify Access' external references and re-establish these if possible.
' Uses function IsBroken97().
'
' 2001-07-29. Cactus Data ApS, CPH.
' 2003-07-23.
' Changes:
' Added call to DoCmd.Echo True to allow for display of MsgBox.
' Removed call to SysCmd() compilation which did not work.
Dim refA As Access.Reference
Dim refX As Access.Reference
Dim strRefFullPath As String
Dim booNotBuiltInRefExists As Boolean
Dim booIsBroken As Boolean
Dim booRefIsMissing As Boolean
Dim strMsgTitle As String
Dim strMsgPrompt As String
Dim strMsgHeader As String
Dim strMsgFooter As String
Dim lngMsgStyle As Long
Dim strCrLf As String
' No special error handling.
On Error Resume Next
' User oriented error message.
strMsgTitle = "Missing support file"
strMsgHeader = "One or more supporting files are missing:" & vbCrLf
strMsgFooter = vbCrLf & vbCrLf & "Report this to IT support." & vbCrLf
strMsgFooter = strMsgFooter & "Program execution cannot continue."
lngMsgStyle = vbCritical + vbOKOnly
' Look for the first reference in the database other than
' the built in "Access" and "Visual Basic for Applications".
For Each refA In Access.Application.References
If refA.BuiltIn = False Then
' At least one not built in reference is in use.
booNotBuiltInRefExists = True
' Check if the reference is not broken.
If IsBroken97(refA) = False Then
' The first not missing not built in reference is found.
Set refX = refA
Exit For
End If
End If
Next
If booNotBuiltInRefExists = False Then
' Only built in references are in use.
' Nothing more to do.
Else
If refX Is Nothing Then
' All not built in references are missing.
' Don't remove missing references as there is no way to
' re-establish a reference if its identity is lost.
Else
' Remove this not built in reference and add it back to
' force Access to revalidate all references.
' This may or may not rebuild links to missing references.
With Access.Application.References
strRefFullPath = refX.FullPath
.Remove refX
.AddFromFile strRefFullPath
End With
Set refX = Nothing
End If
' Check references if any should be missing.
' If so, no attempt to read a reference is done as it most likely
' either is not installed or has been moved to an unknown directory.
For Each refA In Access.Application.References
booIsBroken = IsBroken97(refA)
If booIsBroken = True Then
' Build list of missing files.
strMsgPrompt = strMsgPrompt & vbCrLf & refA.FullPath
End If
booRefIsMissing = booRefIsMissing Or booIsBroken
Next
' If any reference is broken, display error message if requested.
If booRefIsMissing = True And booErrorDisplay = True Then
strMsgPrompt = strMsgHeader & strMsgPrompt & strMsgFooter
Access.Application.DoCmd.Beep
Access.DoCmd.Echo True
VBA.MsgBox strMsgPrompt, lngMsgStyle, strMsgTitle
End If
End If
Set refA = Nothing
' If References have been updated, the application is left decompiled.
' Run command in AutoExec macro to compile and save all modules.
VerifyReferences = Not booRefIsMissing
End Function
</code>
- and the IsBroken97 function:
<code>
Public Function IsBroken97(ByVal ref As Access.Reference) As Boolean
' Alternative method to check if a reference is broken
' as the IsBroken property cannot be used in Access97.
'
' 2000-03-19. Gustav Brock. Cactus Data ApS.
' Refer to this article at Microsoft Technet:
'
' Article ID: Q186720
'
' The information in this article applies to:
' Microsoft Access 97
'
' SYMPTOMS
' In Microsoft Access, IsBroken is a property of the References collection.
' The Microsoft Access Help topic on the Isbroken property states the following:
'
' The IsBroken property returns a Boolean value indicating whether a
' Reference object points to a valid reference in the Windows Registry.
'
' Although this statement is correct, to receive this Boolean value
' you must trap for errors that are generated by the broken reference.
' Also, the IsBroken property becomes True only when the file being referenced
' is deleted and the Microsoft Windows Recycle Bin is emptied.
' This article details the steps necessary to receive the Boolean value.
Dim booRefOK As Boolean
On Error GoTo Err_IsBroken97
If Len(Dir(ref.FullPath, vbNormal)) > 0 Then
booRefOK = Not ref.IsBroken
End If
Exit_IsBroken97:
IsBroken97 = Not booRefOK
Exit Function
Err_IsBroken97:
' Ignore non existing servers, drives, and paths.
Resume Exit_IsBroken97
End Function
</code>
/gustav
>>> bchacc at san.rr.com 08-08-2006 20:29:35 >>>
Gustav:
The code I was using did go backwards through the references but still
choked on the first one which was the missing reference. Seems there's
nothing in the reference so MsgBox ref.Name fails as well as .Remove.
Rocky
Gustav Brock wrote:
> Hi Rocky
>
> Further to Charlotte's comments, I faintly recall you have to move backwards in the References collection:
>
> Public Function ReferencesClean() As Boolean
>
> ' Remove all missing references.
> ' Return True if no reference was removed.
> '
> ' 2001-08-20. Cactus Data ApS, CPH.
>
> Dim ref As Reference
> Dim lngItem As Long
> Dim booMissing As Boolean
>
> With References
> For lngItem = .Count To 1 Step -1
> Set ref = .Item(lngItem)
> If ref.BuiltIn = True Then
> ' No need to check built in reference.
> ElseIf IsBroken97(ref) Then
> .Remove ref
> booMissing = True
> End If
> Next
> End With
>
> Set ref = Nothing
>
> ReferencesClean = Not booMissing
>
> End Function
>
> Still, your code will be left non-compiled after this. A method to compile the code is described by Charlotte and me if you search the archives of July 2003 for:
> "Broken References in Runtime AXP and A97"
>
> /gustav
>
>
>>>> bchacc at san.rr.com 08-08-2006 19:46:07 >>>
>>>>
> Dear List:
>
> Still struggling with this references thing. It seem the easiest thing
> to do would be to remove the missing reference in the Open event of the
> opening form in the event the app is loaded onto a machine which doesn't
> have the library. However, all the code that I've seen to remove
> missing references fail. Code like:
>
> Dim refCurr As Reference
> For Each refCurr In References
> If refCurr.IsBroken Then
> References.Remove refCurr
> End If
> Next
>
> Seems straightforward but when it comes to the missing reference it
> errors out on the .Remove line because it doesn't have a name. So. How
> do you remove a missing reference when the application the reference is
> referring to doesn't exist?
>
> MTIA
>
> Rocky