how to solve it?

>> CalOptions.ExpectedCheckerSize = [8,6];

CalOptions.ExpectedCheckerSpacing_m = 1e-3 * [35.1, 35.0];

LFUtilCalLensletCam() ...'Cameras/A000424242/PlenCalSmallExample',CalOptions);

Processing all subimages.Error using truesize>ParseInputs (line 352)

Current figure has no axes.

Error truesize (line 30)

oneImageAndOneAxes, oneImageAndOneColorbar] = ParseInputs(varargin{:});

Error LFCalFindCheckerCorners (line 188)

truesize([150,150]); % bigger display

Error LFUtilCalLensletCam (line 121)

CalOptions = LFCalFindCheckerCorners( InputPath, CalOptions );