This message is caused by the inproper closing of the Training Control Screen. When the TCS is improperly closed, the BrainMaster amplifier still thinks it is in the last session. When you attempt to start a new session you will get the Buffer Overflow error message.

To close the Training Control Screen properly:

1. Never close the Training Control Screen by clicking on the Red X.
   
2. If a session is running click on STOP
3. Click on Close