open failed for members while creating standby via duplicate command

Hi Everyone,

Facing this issue as the redo log file are not available in the standby database and we are not able to drop it either. Please help.

    GROUP#    THREAD#  SEQUENCE#      BYTES  BLOCKSIZE    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME         NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ------------------ ------------ ------------------

         3          1        963   20971520        512          2 YES CLEARING            5.9712E+12 16-MAR-17            5.9712E+12 16-MAR-17

         4          1        964   20971520        512          2 YES CLEARING            5.9712E+12 16-MAR-17            5.9712E+12 16-MAR-17

         7          1        962   20971520        512          2 YES CLEARING            5.9712E+12 16-MAR-17            5.9712E+12 16-MAR-17

         6          1        966   20971520        512          2 YES CURRENT             5.9712E+12 16-MAR-17            5.9712E+12 16-MAR-17

         5          1        965   20971520        512          2 YES CLEARING            5.9712E+12 16-MAR-17            5.9712E+12 16-MAR-17

Standby redo logfile;

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Errors in file /d00/oracle/PRODERP/db/tech_st/11.2.0/admin/ERPCLONE_erprhel/diag/rdbms/erpclone_stby/ERPCLONE/trace/ERPCLONE_mrp0_892.trc: