Execute Task on a Client

Friends
   
  Can some one explain me functionality of RBTRCLLIB/RCLEXEC and subsequent 
commands in the below code.Greatly appreciate your help!
   
  When I take F4 on that I get Execute Task on a Client (RCLEXEC), Iam not 
familiar with this, I am trying to learn what it is.
   
  Donna.
   
   
  SAP:                                                                  
             If         Cond(&FileType *EQ 'SAP') Then(do)            
                                                                        
             RTVDAT     CCYYMMDD(&DATE)                                 
             CHGVAR VAR(&IFS_File) +                                    
                    VALUE(&IFS_Send *TCAT 'RN_SAP_' *CAT &DATE *TCAT  
                                                                        
             GOTO AFTER                                                 
             CALL PGM(PYURPG)                                        
 AFTER:                                                                         
             
                                       
             CPYTOSTMF +                                                
  FROMMBR(&PYUP) TOSTMF(&IFS_File) STMFOPT(*REPLACE)  
  STMFCODPAG(*PCASCII)  ENDLINFMT(*CRLF)                   
                                                           
ChgVar Var(&Robot) Value(&IFS_File *BCAT &DnB_PGP)         
                                                           
RBTRCLLIB/RCLEXEC CLIENT(AS400W2K) +                       
CMD('D:\scripts\abc\PYXN.bat') +                         
PARM(&Rbt) DESC('Transmission') WAIT(*YES)           
ENDDO          

                
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