Removes the error descriptions for a focused node.
Use the ClearColumnErrors method to clear errors set using the TreeList.SetColumnError method. For instance, if an end-user entered invalid data, then you could set column errors via TreeList.SetColumnError, and indicate which cells contain invalid values. After the errors are corrected, you can then call the ClearColumnErrors method to remove the error icons.
The ClearColumnErrors method does not clear errors notified by the data source. To clear these errors, you need to use the members provided by your data source.