How to apply reconstruction on images?

Hi, I'm trying to do reconstruction in my matlab code, it doesn't work the first time and gives a blank black image. Though it runs after the code is run two or three times. I have tried the clear all statement. Kindly help me how can I fix this glitch?

Any help would be appreciated.

% erosion

se = strel('ball',9,9);

e=imerode(blue_nuclei,se);

figure, imshow(e), title('erosion');

% reconstruction

IM = imreconstruct(e,segmented_images{2});

figure, imshow(IM), title('reconstructed2');

[Image Analyst]

You'll need to attach the image, and the code you used to produce the blue_nuclei variable.