error message "Unable to communicate with thread that fills the sound buffer contents"

We are running into the following error message with EPrime 2.0 professional

 

"Unable to communicate with thread that fills the sound buffer contents

 

We have run this scripts for several subjects and it never happened before. We are not sure why this happened since we did not change our script or sound wave files. 

 

I saw this error in previous posts but I cannot find answers with the solution!

 

 Any suggestion will be highly appreciated. 

 

Best,

Paula