Scheduled Refresh Error Message

Thanks for all your responses.  I am still getting this error.  Have updated the gateway, refreshed the model locally and scheduled refreshes throughout the day.  I am still able to refresh the dataset locally but not in the service.  Do not know if this is an issue, but in the model I attach to a Service dataset.  When I go to Gateway I see this as part of my connections.  See a "circle with and x" but do not know if that means anything.  This is still going against another dataset.  The lineage works fine and I think the credentials are fine.  I refresh them fine in the service.