No data values showing up in a supervised classification

Discussion created by grastafaram on May 31, 2012
Latest reply on Jun 1, 2012 by grastafaram
Hi, I have been doing supervised classifications for several Landsat images.  For the last image I classified as usual, but when I ran the classification two of the categories came up as no data.  I have included a screen shot of a the classification with no data.  I have no idea what went wrong with this classification as I followed the same work flow for all of the previous classifications, which ran fine.  I am using ArcGIS 10, and Windows 7 Professional.  If anyone has any ideas I would really appreciate the help.