I have a method that is called during the refresh method of a control that has this line in it:

IF SEEK(.ctrZip.cboCountry.VALUE,'Countries','cn_Key')

Sometimes (not always) when the line is executed it triggers an error: #26 'Table has no index order set'.
When I debug it and step through the code, the error does not occur. I have verified that the tag ('CN_KEY') is still there.

Any ideas?

TIA