More details. If this is happening a lot you need to post it in the Support section. If it is serious you also need to read how to post log files, and post log files.
Was trying to use the QVR library (https://github.com/marlam/qvr) to port our opengl application to oculus rift. It was working okay, but since I did a repair Oculus installation, it reports the above issues in the qvr debug log.