The following condition-report messages (mainly: errors) are not specific to
any particular command or small group of commands:

       Argument exceeds buffersize                               
       Argument invalid for command                              
       Array index out of range                                   (7.0)
       Error in argument                                         
       Error in range                                            
       Illegal array access                                       (7.0)
       Illegal redefinition of active register or function-key   
       Invalid register                                          
       List invalid for command                                  
       No argument given                                         
       No list given                                             
       No range given                                            
       Not available for this platform                           
       Out of memory                                             
       Range invalid for command                                 
       Read-only register                                        
       Register contains no character-string                     
       Register contains no numeric value                        
       Register is not read-only                                 
       Unrecognized or improperly placed command                 

       Internal error                                            
       Unknown error