Depending on your application, you may or may not be able to see good diagnostics messages before the program terminates. This problem is likely due a version mismatch. Check the appropriate Aardvark device user manual and read the description of the versioning under the "Software" section. Try one of the sample programs on our website. If it works, your Aardvark device is properly setup to run on your system and the problem you are seeing is with the application you are running.