Error in function MakeTexture (Matlab and Psychtoolbox)

Here is the error I am getting:

Error in function MakeTexture:   Invalid Window (or Texture) Index provided: It doesn't correspond to an open window or texture.
Did you close it accidentally via Screen('Close') or Screen('CloseAll') ?
Error using Screen
Usage:

textureIndex=Screen('MakeTexture', WindowIndex, imageMatrix [, optimizeForDrawAngle=0] [,
specialFlags=0] [, floatprecision=0] [, textureOrientation=0] [, textureShader=0]);

Error in SLM/updateSLMDisplay (line 104)
texture = Screen(slm.window, 'MakeTexture', grayVals);

The code has been working without any problems on Matlab 2014a on a different computer. I am trying to run the same code on a new computer (with matlab 2016a). After installing psychtoolbox, I got the code to run correctly, but due to some weird hardware issues, in my debugging process I thought I'd try to reinstall psychtoolbox by using SetupPsychtoolbox. After running this, I am getting the above error. Anyone have any ideas? Thank you

[Manuela Ruzzoli]

Hi, I also have the same problem. Did you manage to solve it? Thanks

[Daniel Revach]

Same problem here, any progress?

[Yuxian Zhang]

You need to use this command to open window first:

[win,winrect] = Screen('OpenWindow',1,[255 255 255])