Why does my camera calibration fail

I am using the cameraCalibrator gui in r2016a. I load my images and verify that corners were detected correctly. Then I click calibrate, and a dialog appears which says Calibration Failed: Too many output arguments. I can't find any documentation on why this would happen. I've tried different subsets of images, and I can't get past this error message.

[Geoff Hayes]

Matt - can you copy and paste the full error message? It sounds like there is some code that is expecting more output arguments than what should be returned by the function. For example,

 >> [a,b] = sin(pi);

 Error using sin
 Too many output arguments.

because my code is wanting two outputs from the sin function but only one is to be returned.