Item Update "Value does not fall within the expected range"

Question

If I run each line individually, it works. But If I try to run the script with the for each loop, I get: Exception calling "Update" with "0" argument(s): "Value does not fall within the expected range."

Code:

 $listItems = $list.GetItems($query)
   $query.ListItemCollectionPosition = $listItems.ListItemCollectionPosition

 foreach($item in $listItems)
       {  
             # DeleteItems
             # UpdateItems
             # CancelWorkflows
             $reason = $item["Reason"] + "  -- This Exception was open more than 30 days and will be closed by the administrator"
             $item["Reason"] = $reason
             $item.Update()
             Write-Host "Added Reason Code - $($item.ID)"
              $reason = $null
              $count = $count+1
       }

Do I need to update a different way? When I break and check the variables, $item["Reason"] is empty so it makes sense that I have 0 arguments.

More Info: There are some columns that are required. There is a chance one of them may be empty and so the item can't be updated unless that field has a value. Can I force an update to an item even if a required field is blank?

Answer 1

OK, following my comment above, I had another thought for the problem. It's probably your new $reason value being longer than 255 characters. If your Reason field is a single-line text field, it cannot contain a string >255 char, hence the error message.