MATLAB GigE Snapshot Returns Empty Image/Matrix

I am trying to use a FLIR Camera connected through GigE. I go through the correct sequence of commands, identifying a gigecam(1), taking a snapshot of the gigecam, and displaying the image using imagesc. However, it appears that I will get a blank image and an empty matrix of 0's some of the time, and I do not understand why. If I restart the program and the camera several times, it will magically work. If I put all the commands in the Command Window, (imagesc(snapshot(gigecam(1)))), it will also work. There is not an issue with the camera. Does someone have any idea why I am getting this issue?

[Walter Roberson]

One of the possible causes for that is running out of bandwidth especially if there are multiple devices sharing the gige network.

Also people who have two gige cameras on the same network can find them conflicting apparently.