Error message generating Adobe Air output Unable to build a valid certificate chain for the signer

Are you talking about AIR Help produced by RoboHelp or an AIR application that you are creating?

If the latter, please see the notice at http://forums.adobe.com/community/robohelp/airhelp

If you are using RoboHelp, which version?

See www.grainge.org for RoboHelp and Authoring tips

@petergrainge