I am trying to compute Segmented Attributes from a Mean Shift Segmentation output. I keep getting the 999999 error. Searching for an answer, I see that the segmented image must have the key property set to SEGMENTED. Not sure if this will solve my issue. I wanted to make sure it was set correctly just in case it was. So, my question is how do you set the key property to SEGMENTED. Thanks in advanced.