- From the Classic Data File Tools IDE, click 
                  		  File > Open. 
                  		
               
- Use the Open dialog box to select and open a data file. 
                  		
               
-  If the data file does not have a file header, and it has no associated profile file, complete the fields on the Data File
                  Editor dialog box; then click 
                  		  OK. See 
                  		  Opening a Data File for more information. 
                  		
               
Note: Fixed- or variable-length indexed, and variable-length sequential or relative files contain file information headers.