U3-HV matlab error

Hello, 

I am trying to gather live data from the daq through matlab and I used the u3_simplestream example and added a live graph. However I would like to make the sample rate 1 per second so that the x axis is a time scale. However when I extend the pause to 2 pause(0.5) functions in the loop I get an error after 8 measurements. 

Do you have a suggestion on how to change the sample rate and make it in terms of time? 

Error Message: 

UD Error: Buffer overrun while streaming.  Stream stopped.                                                                                                                                                                                                               
Error using u3_AIN0PIDstream (line 162)
Message: Exception of type 'LabJack.LabJackUD.LabJackUDException' was thrown.
Source: LJUDDotNet
HelpLink: 
  NetException with properties:

    ExceptionObject: [1×1 LabJack.LabJackUD.LabJackUDException]
         identifier: 'MATLAB:NET:CLRException:MethodInvoke'
            message: 'Message: Exception of type 'LabJack.LabJackUD.LabJackUDException' was thrown.↵Source: LJUDDotNet↵HelpLink: '
              cause: {}
              stack: [1×1 struct]
         Correction: []

UD Error: Buffer overrun while streaming.  Stream stopped.                                                                                                                                                                                                               
Error using u3_AIN0PIDstream (line 162)
Message: Exception of type 'LabJack.LabJackUD.LabJackUDException' was thrown.
Source: LJUDDotNet
HelpLink: 
  NetException with properties:

    ExceptionObject: [1×1 LabJack.LabJackUD.LabJackUDException]
         identifier: 'MATLAB:NET:CLRException:MethodInvoke'
            message: 'Message: Exception of type 'LabJack.LabJackUD.LabJackUDException' was thrown.↵Source: LJUDDotNet↵HelpLink: '
              cause: {}
              stack: [1×1 struct]
         Correction: []

Thanks!