IDC11700I HIGH-LEVEL INDEX STRUCTURE IS NOT UNIQUE

Explanation
A single level index structure is expected, but a horizontal pointer linking one control interval
to another is found. If the dats set is
opened in RLS, The index levels will not be updated until it is closed. 

System action
The control interval is dumped, and processing
continues.

Programmer response
See summary messages for final analysis.
Issue a VERIFY command and reissue the EXAMINE command.

Source
DFSMSdfp