If you are manually uploading your Claims batch without using the Job Scheduler, these are the warnings you might see.
ERROR - DONE WITH WARNINGS
This message indicates there are one or more Encounters with Local Edit Errors that will not be sent in this batch. All of the other Encounters are uploaded in this batch as seen in the status section. It is not necessary to view warnings since these claims will be in the Encounters by Status panel.
ERROR - BATCH WAS NOT SENT
This error means all claims have local edit errors so the entire batch is not sent. To view the errors from the Claims Batch Dashboard, select Claims Batch Items. Select the Errored Claims Only checkbox, or go back to the Encounters by Status panel.