An append was requested and the data set is a member of a partitioned data set (PDS). Before the append can occur, the member must be copied forward in the PDS and in the process is temporarily given a unique name. This process was attempted 999 times and a unique name was not found.
The append is not performed.
The unique names that are used for the copy are created by appending 1, then 2, and so forth to the end of member name (called the base name). If there are members of the PDS that have the same base name as the one for the append and the members are no longer needed, delete them and reissue the append request.
None.