| Code Name | 
          Code | 
          String Return | 
        
        
 
          | TCL_ERROR | 
          0 | 
           
              Pin <name> is not a clock pin 
           | 
        
         
          | TCL_ERROR | 
          1 | 
           
             Usage: remove_clock [-all] <clock_pin_list> 
           | 
 
          | TCL_ERROR | 
          1 | 
           
              Must use either -all option or clock pin list 
           | 
        
		
 
          | TCL_ERROR | 
          1 | 
          Unknown option <name> | 
        
 
          | TCL_ERROR | 
          1 | 
          One or more Quartus® II settings and configuration files are not writable | 
        
 
          | TCL_ERROR | 
          1 | 
          Quartus II settings and configuration files may be corrupted | 
        
 
          | TCL_ERROR | 
          1 | 
          Unknown problem in processing the command | 
        
 
          | TCL_ERROR | 
          1 | 
          Unknown command-line option <name> | 
        
 
          | TCL_ERROR | 
          1 | 
          A Tcl transaction is in progress and must be completed before executing: | 
        
 
          | TCL_ERROR | 
          1 | 
          Project has no active compiler setting | 
        
 
          | TCL_ERROR | 
          1 | 
          No project is currently open |