That is odd... I see a blue diamond in the "IO" lane, and when I select it, it shows the "Output Data" to the right... I don't see the "IO" lane in your snip at all... so it must be something else? 

If the Gateways are configured on mirrored instances of HealthShare, then typically a virtual IP is used to determine and redirect to the active instance, to provide for high availability or fail over.  If not, then perhaps this approach could be considered?  

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