Ado Update batch - ms-access

Question

I am having and issue using update batch. I have a loop that goes through a recordset updating values. I have a minimum of 333 things in the batch. When it gets to the 254th item it bails. is there a limit to a batch.
On Error GoTo Err_cmdProcessAll
Dim cn As ADODB.Connection
Dim rs As ADODB.Recordset
Dim strTableName As String
Dim strSql As String
'
Set cn = New ADODB.Connection
cn.Open "Provider=sqloledb; " & _
"Data Source=" & "BLD-FS-SQLVS04\PRDINST4" & ";" & _
"Initial Catalog=" & "HNFS_NetProv" & ";" & _
"Integrated Security=SSPI;"
cn.CursorLocation = adUseServer
Dim strSortField As String
Dim additionalwhere As String
If cboValue = "pc3Claims" Then
strTableName = "Seq3_PendedClaims_Ranked"
strSortField = "DaysSinceReceivedClaim"
' additionalwhere = " AND (member_eligibility_ud Not Like '%Program%')
strSql = "Select * " & _
"FROM " & strTableName & _
" WHERE (Complete Is Null) And (AssignedTo Is Null)" & additionalwhere & _
" ORDER BY cast( " & strSortField & " as int )" & strSort
ElseIf cboValue = "pc3ContractAssignments" Then
strSortField = "date"
additionalwhere = ""
strSql = "Select * " & _
"FROM " & strTableName & _
" WHERE (Complete Is Null) And (AssignedTo Is Null)" & additionalwhere & _
" ORDER BY CONVERT(varchar(10), CONVERT(datetime, [" & strSortField & "], 111), 121) " & strSort
End If
Set rs = New ADODB.Recordset
With rs
Set .ActiveConnection = cn
.Source = strSql
.LockType = adLockOptimistic
.CursorType = adOpenKeyset
.CursorLocation = adUseClient
.Open
End With
'make change to above to include
Dim i As Long
Dim j As Long
Dim strAssignAssociate As String
Dim lngAllocAmt As Long
For i = 1 To ListView6.ListItems.Count
If ListView6.ListItems(i).Checked Then
strAssignAssociate = ListView6.ListItems(i).SubItems(1)
Debug.Print strAssignAssociate
lngAllocAmt = ListView6.ListItems(i).Text
For j = 1 To lngAllocAmt
Debug.Print rs.Fields("AssignedTo")
rs.Fields("AssignedTo") = strAssignAssociate
Debug.Print rs.Fields("AssignedTo")
rs.MoveNext
Next j
End If
Next i
rs.UpdateBatch
MsgBox "All Finished", vbOKOnly, "Inventory Control"
Set rs = Nothing
Set cn = Nothing

Answer 1

I found the problem. I am using a non-keyed file. I found that I had duplicates in the file. this has been rectified and the above code works fine.