We are facing issue while doing upgrade from 8.1.1.11 to Siebel IP 2016. We are getting error DDLIMP

2016-05-17 09:32:33     DDLIMP-ERR-0005: SQLFetch: select NULL TABLE_QUALIFIER, ic.table_owner, ic.table_name,           decode (i.uniqueness, 'NONUNIQUE', 1, 0),           NULL IND_QUALIFIER, ic.index_name, 3 IND_TYPE,           ic.column_position, ic.column_name,           decode (ic.descend, 'DESC', 'D', 'A') COLLATION,          NULL CARDINALITY, LEAF_BLOCKS PAGES      from all_indexes i, all_ind_columns ic     where i.table_owner = ?       and i.table_name LIKE ?       and ic.index_owner = i.owner       and ic.index_name  = i.index_name  order by ic.table_owner, ic.table_name, i.index_name, ic.column_position

2016-05-17 09:32:33     DDLIMP-ERR-1065: Unable to read index "unknown" (UTLDbDsTblIColsFetch).

2016-05-17 09:32:33     DDLIMP-ERR-1063: Unable to read table "unknown" (UTLDbDsTblIndsRead).