matlab support package for arduino is not working

i am using matlab 2014a. yesterday i installed matlab support package for arduino. but when write the code " a = arduino('COM3')" and press enter button in command window, a message comes up "Updating server code on Arduino Uno (COM3). Please wait. Cannot program Arduino board Uno (COM3). Please make sure the board is supported and the port and board type are correct." what can i do to solve that problem. thanks

Answer 1

[Madhu Govindarajan]

If you have confirmed that the board is in fact on COM3 and it is Arduino Uno can you see what happens when you run this command?

>> a = arduino('com3','Uno');

[Deepak Kumarr]

then also its not working

[Jose antonio]

remove the winavr