docmd.openform Invalid database object reference

I have a problem and I hope you will agree to help me.

After modifying database links (front end to new backend),
one form does not open and generated reference error 3276.

I open the form by clicking on tree control node.
but It does not open directly from DB window.

but, If I compact & Repair the file it opens correctly.

What should I do in order to ovoid this error ?

Private Sub menuTree_Click()
Dim strcrit As String
stricrit = menuTree.SelectedItem.Key
DoCmd.Close
DoCmd.OpenForm stricrit End Sub

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Here is my code:

Dim Var1 As Integer

If Me.txtPassword.Value <> DLookup("Password", "Analysts", _
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Code Correction :|
If Me.PASS.Value = Nz(DLookup("Password", "tblEmployees", "[Employee]=" & Chr(34) & Me.EMP.Value & Chr(34)), vbNullString) Then
gstrUserName = Me.EMP.Value
gstrPassword = Me.PASS.Value

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DoCmd.Close acForm, "UserNew", acSaveNo
DoCmd.OpenForm "Data"

Else
Countabc = Countabc + 1
If Countabc > 3 Then
MsgBox "You do not have access to this database. Please contact your system administrator.", vbCritical, "Restricted Access!"
Application.Quit
Else

MsgBox "Password Invalid. Please Try Again", vbOKOnly, "Invalid Entry!"
Me.PASS.SetFocus
End If
End If
Me.EMP.SetFocus

I actually wanna close the appilcation if the passwrod is incorrect for 3 times.
Please advise if the above code is incorrect


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