Restriction:  
       
        - You can only compile individual COBOL programs that are part of a native project, or a managed Mainframe Subsystem Application project that compiles to multiple output files. 
        
- It is not possible to compile copybook files. 
        
 
 
    To compile an individual COBOL, IMS, JCL, or BMS file in your project: 
    
 
     
      - In Solution Explorer, right-click the file you want to compile. 
      
- Click 
        Compile. 
        This option is not available when a build is already in progress or when you are debugging the application.