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Help With this Error 13 on Access 2007 db VBA code

this is the module that gets Error 13, typ mismatch:

Function FindMax2()

    Dim db As DAO.Database
    Dim mx As Integer
    Dim rs As DAO.Recordset
    Dim rsVal As String
   
   
    Set db = CurrentDb()
    Set rs = db.OpenRecordset("UtilityPermit", dbOpenDynaset)
   
    rs.MoveFirst
   
   
    rsVal = rs.Fields("[UtilityPermitNumber]").Value
    mx = Right(rsVal, Len(rsVal) - 8)
   
    Do While Not rs.EOF
        rsVal = rs.Fields("[UtilityPermitNumber]").Value
        If Right(rsVal, Len(rsVal) - 8) > mx Then
        mx = Right(rsVal, Len(rsVal) - 8)
        End If
        rs.MoveNext
    Loop
    FindMax2 = "GRB10-U-" & (mx + 1)
End Function

and this is the utility permit numbers that have been generated from it:

UtilityPermitNumber
GRB10-U-1
GRB10-U-10
GRB10-U-11
GRB10-U-12
GRB10-U-13
GRB10-U-14
GRB10-U-15
GRB10-U-16
GRB10-U-17
GRB10-U-18
GRB10-U-19
GRB10-U-2
GRB10-U-20
GRB10-U-21
GRB10-U-22
GRB10-U-23
GRB10-U-24
GRB10-U-25
GRB10-U-26
GRB10-U-27
GRB10-U-28
GRB10-U-29
GRB10-U-3
GRB10-U-30
GRB10-U-31
GRB10-U-32
GRB10-U-33
GRB10-U-34
GRB10-U-35
GRB10-U-36 - REVISED
GRB10-U-37
GRB10-U-38
GRB10-U-39
GRB10-U-4
GRB10-U-40
GRB10-U-41
GRB10-U-42
GRB10-U-43
GRB10-U-44
GRB10-U-45
GRB10-U-46
GRB10-U-47
GRB10-U-48
GRB10-U-49
GRB10-U-5
GRB10-U-6
GRB10-U-7
GRB10-U-8
GRB10-U-9

at this point it will not add another record.  I get  a Run-tme error '13'.  can anyone help me with this code.  I know it is a minor problem, but I don't know exactly what.  Thanks.
0
GarfieldCO
Asked:
GarfieldCO
1 Solution
 
Patrick MatthewsCommented:
Once you hit "GRB10-U-36 - REVISED" you will get a type mismatch: you won't be able to convert that text into an Integer :)
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