Why do I receive an Assertion failed.error in Measuring Planar Objects with a Calibrated Camera

If I try to run the calibration code as explained in webpage, sometimes I have got the assertion failed error message. However, If I use the same images with Calibration app, I have not received any error. Please let me know... why such error occurred. Thanks.

Error Message:

Error using vision.internal.calibration.CameraParametersImpl>getFullBounds (line 906) Assertion failed. Error in vision.internal.calibration.CameraParametersImpl/computeUndistortBounds (line 782) [xBounds, yBounds] = getFullBounds(undistortedMask, ... Error in vision.internal.calibration.CameraParametersImpl/undistortImageImpl (line 539) [xBounds, yBounds] = computeUndistortBounds(this, ... Error in undistortImage (line 97) [J, newOrigin] = undistortImageImpl(cameraParams, I, interp, outputView, fillValues); Error in calibrationtest (line 34) [im, newOrigin] = undistortImage(imOrig, cameraParams, 'OutputView', 'full');