openni_tracker has problem opening database/parameter File

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 The camera topics launch file is the following 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