IKJEFT01 do not recognize system DSN

say for the follwoeing JCL snippet, when i am running this, where PROGRAM1 is a simple COBOL DB2 program

//STEP01 EXEC PGM=IKJEFT1B
//SYSPRINT DD SYSOUT=*
//SYSTSPRT DD SYSOUT=*
//SYSTSIN DD *
DSN SYSTEM (INGG)
RUN PROGRAM (PROGRAM1)
END
//

I am getting:-

Micro Focus ESMVS/TSO Version 7.0.000. Copyright (C) 1997-2015 Micro Focus.              All rights reserved.                         
 DSN SYSTEM (INGG)                                                                                                                    
 RUN PROGRAM (TCFAUTRF)                                                                                                               
MVSER0031S "INGG" is not a valid subsystem id. Sub-command stream flushed.:                                                           
MVSER0099S Remainder of command stream flushed.:                                                                                      
 END              

even though INGG is already defined as a system DSN . please advise on the root cause of this