openni_tracker has problem opening database/parameter File

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I'm trying to use the openni_launch and openni_tracker packages. I made a package called kinect_hmi and a launch file which launches both the openni_launch file and openni_track. When I tested this previously I could view he PointCloud2 data and the tf data in RVIZ. However, today when I started up the code I get the following error.

Error opening database/parameters file.

The point cloud data still shows up in RVIZ, but the skeleton tracking does not seem to be working. I tried starting roscore, openni_launch, and openni_tracker separately to see if my launch file was the problem but it didn't help. I have no idea why it isn't working all of the sudden.

Just in case here is my launch file

<launch>
  <include file="$(find kinect_hmi)/launch/camera_topics.launch" />
  <node pkg="tf" type="static_transform_publisher" name="depth_to_camera_broadcaster" args="0 0 0 0 0 0 camera_link openni_depth_frame 100" />
  <node name="openni_tracker" pkg="openni_tracker" type="openni_tracker" respawn="true"/>
</launch>

The camera topics launch file is the following

<launch>
  <include file="$(find openni_launch)/launch/openni.launch" />
</launch>

I thought maybe that the parameter server wasn't running so I tried the rosparam list command. However, the command returns a long list of things so I'm assuming that the parameter server is running.

My question is: Why is this happening and how do I fix it?

Thanks in advance