ekf_localization does not publish odometry

edit

I got this output at terminal. Echoing odometry/filtered does not produce anything.

I am using fovis as odometry source

[ WARN] [1438250290.975116879]: Could not obtain transform from /odom to odom. Error was Invalid argument "/odom" passed to lookupTransform argument source_frame in tf2 frame_ids cannot start with a '/' like:

EDIT: kinect_odometer/info gives this:

---
header: 
  seq: 428
  stamp: 
    secs: 1438485119
    nsecs: 925958292
  frame_id: ''
change_reference_frame: True
fast_threshold: 20
num_total_detected_keypoints: 1354
num_detected_keypoints: [983, 267, 104]
num_total_keypoints: 219
num_keypoints: [156, 44, 19]
motion_estimate_status_code: 1
motion_estimate_status: SUCCESS
motion_estimate_valid: True
num_matches: 153
num_inliers: 111
num_reprojection_failures: 6
runtime: 0.09568407
---
header: 
  seq: 429
  stamp: 
    secs: 1438485120
    nsecs: 26003795
  frame_id: ''
change_reference_frame: True
fast_threshold: 20
num_total_detected_keypoints: 1340
num_detected_keypoints: [963, 270, 107]
num_total_keypoints: 229
num_keypoints: [165, 43, 21]
motion_estimate_status_code: 1
motion_estimate_status: SUCCESS
motion_estimate_valid: True
num_matches: 165
num_inliers: 124
num_reprojection_failures: 6
runtime: 0.108261896
---

echoing /diagnostics gives this:

status: 
  - 
    level: 0
    name: ekf_localization: Filter diagnostic updater
    message: The robot_localization state estimation node appears to be functioning properly.
    hardware_id: none
    values: []
  - 
    level: 2
    name: ekf_localization: odometry/filtered topic status
    message: No events recorded.
    hardware_id: none
    values: 
      - 
        key: Events in window
        value: 0
      - 
        key: Events since startup
        value: 0
      - 
        key: Duration of window (s)
        value: 10.199988
      - 
        key: Actual frequency (Hz)
        value: 0.000000
      - 
        key: Minimum acceptable frequency (Hz)
        value: 25.200000
      - 
        key: Maximum acceptable frequency (Hz)
        value: 35.200000
---

What does it mean?

My launchfile:

<launch>

<node pkg="robot_localization" type="ekf_localization_node" name="ekf_localization" clear_params="true" output="screen">

  <param name="frequency" value="30"/>
  <param name="sensor_timeout" value="0.2"/>
  <param name="two_d_mode" value="true"/>
  <param name="world_frame" value="odom"/>

  <param name="transform_time_offset" value="0.0"/>

  <param name="odom0" value="kinect_odometer/odometry" />
  <!-- param name="odom1" value="example/another_odom"/> -->
  <!-- param name="twist0" value="kinect_odometer/odometry/twist"/ -->
  <!-- param name="pose0" value="kinect_odometer/odometry/pose"/ -->
  <!-- param name="twist0" value="example/twist" /-->
  <!-- param name="imu0" value="imu_gyro"/ -->

  <rosparam param="odom0_config">[true, true, true,
                                  true, true, true,
                                  true,  true, true,
                                  true, true, true,
                                  false, false, false]</rosparam>

  <rosparam param="odom1_config">[false, false, false,
                                  false, false, false,
                                  true,  false, false,
                                  false, false, false,
                                  false, false, false]</rosparam>

  <rosparam param="pose0_config">[true,  true,  true,
                                  true, true, true,
                                  false, false, false,
                                  false, false, false,
                                  false, false, false]</rosparam>

  <rosparam param="twist0_config">[false, false, false,
                                   false, false, false,
                                   true,  true,  true,
                                   true,  true,  true,
                                   false, false, false]</rosparam>

  <rosparam param="imu0_config">[false, false, false,
                                 false,  false,  false,
                                 false, false, false,
                                 false,  false,  true,
                                 false,  false,  false]</rosparam>

  <param name="odom0_differential" value="false"/>
  <param name="odom1_differential" value="false"/>
  <param name="pose0_differential" value="false"/>
  <param name="imu0_differential" value="true"/>

  <param name="odom0_relative" value="true"/>
  <param name="odom1_relative" value="false"/>
  <param name="pose0_relative" value="true"/>
  <param name="imu0_relative" value="false"/>

  <param name="imu0_remove_gravitational_acceleration" value="true"/>

  <param name="print_diagnostics" value="true"/>

  <!-- ======== ADVANCED PARAMETERS ======== -->

  <param name="odom0_queue_size" value="2"/>
  <param name="odom1_queue_size" value="1"/>
  <param name="pose0_queue_size" value="10"/>
  <param name="twist0_queue_size" value="3"/>
  <param name="imu0_queue_size" value="10"/>

  <param name="odom0_pose_rejection_threshold" value="5"/>
  <param name="odom0_twist_rejection_threshold" value="1"/>
  <param name="pose0_rejection_threshold" value="2"/>
  <param name="twist0_rejection_threshold" value="1.2"/>
  <param name="imu0_pose_rejection_threshold" value="0.3"/>
  <param ...