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Stereo vision calibration not calibrating

So I was following this guide in order to calibrate two of my cameras using the grid paper:

 

http://zone.ni.com/reference/en-XX/help/370281W-01/imaqvision/stereo_vision_example/

 

I have problems at step 7 where there are four different acquisitions the program asks for in order: flat, tilted left side, tilted right side, tilted downwards and tilted upwards. 

 

However, after the tilted upwards, it just continues to acquire images asking for the grid to be tilted upwards forever. I never get to step 8 as a result of this.

 

What does this mean?

 

** Note I am using the modified example VI from "Vision Essentials Guide" as instructed from this video: https://youtu.be/bufXESBlzTY

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I have attached a file of how the pic of my grid when the grid is flat. It just continues to acquire images to tilt the grid from the top even when I tilt it. Could someone please help?

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