Changing the channel subsystem ID

To change a CSS ID is only possible via the deviation of repeating (copying) the channel subsystem with a new ID and then delete the source CSS. If you cannot repeat the channel subsystem in the same processor, because all available IDs are occupied, and you want to exchange the IDs of two existing CSSs, then you need to copy both CSSs into a different target processor, delete them in the source processor and copy them back to the source processor with the exchanged IDs.

It may be necessary to restore certain definitions afterwards, for example, coupling facility connections get lost during the copy process.