Enable BCPii communications on the support element

You need to enable cross-partition authority on the support element to allow the support element to accept the BCPii APIs flowing from the user application through the HWIBCPii address space. This setting controls whether a logical partition can issue a subset of control program instructions to other logical partitions activated on the same CPC.

Note: This setting must be selected on the local SE associated with the CPC of the image that the z/OS BCPii application is running on. It must also be selected for any other system for which BCPii communication is required.

To change this setting, perform the following steps on the HMC:

Select the CPC that is required.
Open Single Object Operations.
Open the CPC Operational Customization task list.
Highlight the CPC icon.
Open the Change LPAR Security task, and the Change Logical Partition Security window displays.
Check the cross-partition authority checkbox for each image (LPAR) that you want to grant BCPii access. At a minimum, the image (LPAR) the BCPii address space is running needs to have this authority activated.
Select Save and Change.

See the HMC book and System z9 Support Element Operations Guide and System z10 Support Element Operations Guide for more information regarding changing the support element settings.

Failure to set this properly on the local SE associated with the image of z/OS that is running BCPii results in a severe BCPii address space initialization failure. You cannot start the address space and will receive communications error X'101' with a reason code of X'D4'. Failure to set this up properly on remote SEs to which you want to connect results in the same return code and reason code on the HWICONN service call.

Note: Make the same updates to all CPCs that you want BCPii to communicate with and not just the CPC from which the BCPii application is going to run on.