Dynamic deconcatenation logically disconnects the members of a dynamically concatenated group. You identify the concatenated group to be deconcatenated by specifying the ddname of the group.
When a concatenated group is dynamically deconcatenated, the ddnames that were associated with the data sets before they were concatenated are restored unless this would result in duplicate ddnames. This situation could arise if a dynamic allocation with the ddname to be restored occurred after a dynamic concatenation. In this case, the deconcatenation request fails.
The request for dynamic deconcatenation also fails if the concatenated group is open.
Dynamic deconcatenation has no effect on the in-use attributes associated with the members of the group.