Ok, please refer to the following:

Macro 1(Allowances Macro):
---------
Sub Allowances()  'fills text field based on content of _dropdown field

Dim oFld As FormFields
Set oFld = ActiveDocument.FormFields
Select Case oFld("Country_Name").Result

Case Is = "AUSTRALIA"
oFld("Allowance1").Result = "Car Allowance (IT14-6T01)"
oFld("Allowance2").Result = "Notional Salary Percentage (IT14-4T19)"

'IT185
oFld("ID1").Result = "185-04 Work Permit"
oFld("ID2").Result = "185-10 Passport"
oFld("ID3").Result = "185-45 UID/MIN number- US Benefits ID"
oFld("ID4").Result = "185-50 USA Social Security Number"

Case Else
'Do nothing
End Select
End Sub

Macro 2: Personnel Area Macro:
---------------------------------------

Sub PersonnelAreaMacro()
PersonnelArea.Show
End Sub

User Form (Personnel Area):
-------------
Private Sub UserForm_Initialize()
Dim myArray1() As String    'AUSTRALIA

myArray1 = Split("ADE2(AU02-Adelaide) AUC1(NZ01-Auckland)
BRI2(AU02-Brisbane) CAN2(AU02-Canberra) MEL2(AU02-Melbourne)
MEL3(AU03-Melbourne) PER2(AU02-Perth) SYD2(AU02-Sydney) SYD3(AU03-Sydney)
WEL0(NZ01-Welington)")

Me.PersonnelArea.Clear
Select Case ActiveDocument.FormFields("Country_Name").Result
   Case "AUSTRALIA"
       Me.PersonnelArea.List = myArray1

End Select
End Sub

Private Sub OK_Click()
ActiveDocument.FormFields("PersonnelArea").Result = Me.PersonnelArea.Text
ActiveDocument.Bookmarks("PersonnelArea").Range.Fields(1).Result.Select
Unload Me
End Sub

Private Sub Reset_Click()
ActiveDocument.FormFields("PersonnelArea").Result = "      "
ActiveDocument.Bookmarks("PersonnelArea").Range.Fields(1).Result.Select
Unload Me
End Sub

-----------------------------------
Basically, above are just 2 of the user form and macro that I'm having in
the form now. The Allowances macro was run as the "entry macro" of the
Country_Name field. While the Personnel Area Macro was run as the "entry
macro" when I click on the "Personnel Area" field

I did not get the error when after I save and open the document for several
times. However, the user is getting the error message and the personnel area
that they have entered went missing after they get the error message.