Why do I get error using graph cut method for segmentation?

I generated a segmentImage(RGB) function by choosing my desired foreground and background region using graph cut method. This function is working well with the original image I used to create the function. However, when I use this segmentImage(RGB) function to perform the same segmentation on another image, I get the following error message:

1)Error using lazysnapping>getIndices (line 297) Linear indices cannot exceed the number of elements in the label matrix.

2)Error in lazysnapping>validateInputs (line 258) foregroundInd = getIndices(foreground, size(L));

3)Error in lazysnapping (line 160) [foregroundInd,backgroundInd,is3D] = validateInputs(A,L,foreground,background);

4)Error in ImageAnalysis_v04_GraphCut>segmentImage_g (line 125) BW = lazysnapping(scaledX,L2,foregroundInd,backgroundInd);

5)Error in ImageAnalysis_v04_GraphCut (line 11) [g_BW,g_maskedImage] = segmentImage_g(i);

[Image Analyst]

I don't know. What do you think you can you do to help us help you?

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And don't use i for the name of your image. It's the imaginary variable. Call it grayImage or something descriptive.