Update fax_send.php

app/fax_queue/resources/job/fax_send.php

@@ -297,6 +297,12 @@
 				exit;
 			}
 
+		//check if the uuid exists if it does then end the script
+			if (trim(event_socket_request($fp, "api uuid_exists ".$origination_uuid)) == 'true') {
+				echo "FAX job in progress.\n";
+				exit;
+			}
+
 		//fax options, first attempt use the fax variables from settings
 			if ($fax_retry_count == 0) {
 				$fax_options = "";