Vision Processing in LabView

[Timz3082]

Our team has (finally) gotten our electronics together and begun to test and tweak our code. In order to test and adjust the parameters of our vision code, we have introduced a global variable containing multiple image indicators. At various points throughout our Vision Processing SubVI, we are writing to these variables as a way to "probe" the status of an image after each successive stage of processing.

When we try to run this code and have the global variable's front panel open, we see the images flashing every few seconds and then reverting to black. I do not understand, given that the Vision Processing VI is the only place where this global variable is referenced, why the image becomes black when information is not actively being received.

Is there any way to fix this? Thanks!