Click the "database" option at the top of the page. on the side bar that loads, choose "links" from the first dropdown list, and "properties" from the list below it, then click "go". on the right, the table definition will load. click "URL", and the properties for the column will load. Change the value for "not null" from "yes" to "no", then click "update table links".
Philip
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Limecat is not pleased.