We are trying to run a rex command inside of a custom drill down link. Here is the relevant XML Code we are using: <drilldown> <link target="_blank">search?q=index=exampleIndex* | spath deployment | search deployment="cf-deployment" event_type="LogMessage" source_type= "RTR" msg=*login* | rex field=msg "response_time:(?<resptime>.+?(\D)*[.][0-9]*)" &amp;earliest=$field1.earliest$&amp;latest=$field1.latest$</link> </drilldown> We are receiving the error specified in the title as well as an error that says "Error parsing XML on line 39: Premature end of data in tag form line 1". We tried adding html escape characters with the query as specified in other user questions, but those haven't worked either. Does anybody have an idea? ... View more