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File value being changed upon changing another field via a form

seamus9909
seamus9909 asked
on
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Last Modified: 2014-01-04
I have a a field called  "FileNo"  this number is generated automatically via

Private Sub Form_BeforeUpdate(Cancel As Integer)
Me.FileNo = Year(Date) & "1" & Format(Me.InvoiceID, "00000")
End Sub.


The problem is that I have a record that was created last year as example

FileNo =  201312345677

when  a user opens the record via the form and changes one of the field values the FileNo is being recreated and saved as :

FileNo = 201412345677


ONce the FileNo is originally created I do not want it changed no matter what other changes to the record are being made subsequent to the intial creation of the FileNo.


Please help.
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