I have been working with a GMS model with two TIFF files for background information. After several days of working correctly, the model stopped displaying the imagery. It always took a long time to display them, but after 30 sec to a minute they would display. I deleted the images and reopened them but GMS still does not diaplay them. I tried closing GMS and reopening it, but GMS will still not display them. Does anybody know what is causing this, or have a workaround?