I want to check the classification accuracy with the confusion matrix, but the tool is not working. I've done this previously in early versions of ArcGIS and it worked. What could be the reason?
ERROR 999999: Something unexpected caused the tool to fail. Contact Esri Technical Support (http://esriurl.com/support) to Report a Bug, and refer to the error help for potential solutions or workarounds.
Failed to execute (ComputeConfusionMatrix).
Failed to execute (ComputeConfusionMatrix).