Specifying system parameters

During system initialization, you receive the following message: 
IEA101A SPECIFY SYSTEM PARAMETERS FOR RELEASE xx.yy.zzz

where xx is the release number, yy is the release level, and zzz is the system type.

You must reply to this message with the REPLY command. The short form reply is valid. You can accept the default system parameters by using the following form of the REPLY command with the ‘U’ operand. However, if your system programmer has given you parameters to enter, use the following form of the REPLY command to enter them. 
 
R [0|00],{U                                         }
         {                                          }
         {{'parm=,'                       }[,CONT]  }
         {{'parm=,parm,'                  }         }
         {{'parm=value'                   }         }
         {{'parm=(value[,value]...[,L])'  }         }
         {{'parm=(value[,value]...[,L]),parm=value'}}

The parameters are:

00
The identification number (00) as specified in the message requesting information. A single zero can be used.
U
No parameters are to be changed. The system uses the default list of system parameters in the parmlib data set.
‘parm=,’
The parameter, as specified in the parmlib data set, is to be canceled for this IPL. If a system default exists for this parameter, it is used.
‘parm=,parm,’
The parameters, as specified in the parmlib data set, are to be canceled for this IPL. If system defaults exist for these parameters, they are used.
‘parm=value’
‘parm=(value[,value]...[,L])’
‘parm=(value,value), parm=value’
The specified parameters are to override the corresponding parameters in the parmlib data set. When specifying system parameters, (1) A blank or comma must separate multiple parameters and (2) U is not a valid value for a parameter. The reply can be at most 80 characters per line. If the reply is longer than one line, follow the last parameter with a comma or a blank and CONT. The system prompts you for the remaining values. Example: 
R 00,'MLPA=(00,01,02,CONT'
IEA116A CONTINUE SYSTEM PARAMETERS
R 00,'03,L),BLDL=02'
L
List the parameters as they are processed.

If you are uncertain of the format of a system parameter, see z/OS MVS Initialization and Tuning Reference or ask your system programmer.

Parent topic: REPLY command