The catalog, root-catalog.xml, is stored outside
                of the user's repository and dynamically points to the master-catalog.xml catalog in
                the Content Store currently used.
            It's a good idea to verify that Oxygen is pointing to root-catalog.xml.
        
        - 
                In CCMS Desktop, go to .
            
- 
                Select XML, then XML
                    catalog.
            
- 
                If there is already a line pointing to root-catalog.xml, close the
                    window and move to the next procedure. If there is not already a line pointing
                    to root-catalog.xml, continue with the next step.
            
- 
                Click the + icon below the Catalogs list.
            
- 
                In the Choose Catalog dialog, click the folder icon and
                    select Browse Workspace.
            
- 
                Browse to the Repository folder where root-catalog.xml is stored and
                    select it.
                
                
                    If you do not see root-catalog.xml in the Repository folder,
                        go to  and select the Refresh using
                        native hooks or polling option. Give the IXIASOFT CCMS Desktop a few moments and follow steps 4-6 again. 
 The catalog appears in the Catalogs list. 
- 
                Below the Catalogs list, click the up arrow to move root-catalog.xml to
                    the top of the list.
            
- 
                Click Apply, then OK to close the
                    Preferences window.
            
Next, you need to edit the system ids that the IXIASOFT CCMS Desktop uses to identify which DTDs are used.