Specifying System Parameters Not Defined in LOADxx

The LOAD parameter can supply values not defined at system installation time. If this is not done, you must supply them as system parameters in response to the following system message:
IEA101A SPECIFY SYSTEM PARAMETERS FOR product-name
You must respond to this message. You can respond with specific system parameters, such as
REPLY 00,CLPA,SYSP=83,LNK=(04,05,PQ),SYSNAME=AQ 
However, a typographical error made in this response can lead to undesirable system operation. To help avoid this situation, the system programmer can specify system parameters in IEASYSxx parmlib members. If this has been done, you can respond to message IEA101A in one of the following ways: If the reply is longer than one line (there are 80 characters per line), you can follow the last parameter with a comma or a blank and CONT. For details on how to continue system parameters, see Specifying system parameters in the description of the REPLY command.

For details about parmlib members, see z/OS MVS Initialization and Tuning Reference.