Use a sequence to bulk collect into a collection?

Can bulk collect be used with a sequence to populate a collection of unique surrogate keys? I'm getting the following error:

ORA-01403 no data found
Cause: In a host language program, all records have been fetched. The return code from the fetch was +4, indicating that all records have been returned from
the SQL query.
Action: Terminate processing for the SELECT statement.

The code I've written is as follows (some code cut out):

  CURSOR sqnc_csr IS
    SELECT eqpmt_sqnc.NEXTVAL FROM dual;

    TYPE ew_eqmt_asgn_id_t IS TABLE OF EW_EQMT_ASGN.ew_eqmt_asgn_id%TYPE

INDEX BY BINARY_INTEGER;
    TYPE eqpmnt_asgnmn_id_t IS TABLE OF EW_EQMT_ASGN.eqpmnt_asgnmn_id%TYPE
INDEX BY BINARY_INTEGER;

    TYPE work_item_id_t IS TABLE OF EW_EQMT_ASGN.work_item_id%TYPE INDEX BY BINARY_INTEGER;

    tbl_ew_eqmt_asgn_id       ew_eqmt_asgn_id_t;
    tbl_eqpmnt_asgnmn_id      eqpmnt_asgnmn_id_t;
    tbl_work_item_id          work_item_id_t;

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

-- 

    BEGIN

      OPEN ew_eqmt_asgn_csr;
      LOOP

        EXIT WHEN ew_eqmt_asgn_csr%NOTFOUND;

        FETCH ew_eqmt_asgn_csr BULK COLLECT INTO
          tbl_rowid


        , tbl_ew_eqmt_asgn_id

        , tbl_eqpmnt_asgnmn_id

        , tbl_work_item_id;


      END LOOP;

      CLOSE ew_eqmt_asgn_csr;

      OPEN sqnc_csr;
      FETCH sqnc_csr BULK COLLECT INTO tbl_ew_eqmt_asgn_id;
      CLOSE sqnc_csr;

      OPEN sqnc_csr;
      FETCH sqnc_csr BULK COLLECT INTO tbl_eqpmnt_asgnmn_id;
      CLOSE sqnc_csr;

      OPEN sqnc_csr;
      FETCH sqnc_csr BULK COLLECT INTO tbl_work_item_id;
      CLOSE sqnc_csr;

DBMS_OUTPUT.PUT_LINE ('tbl_ew_eqmt_asgn_id(12)= ' || TO_CHAR
(tbl_ew_eqmt_asgn_id(12)));


At this point the proc bombs with the message above.  Same results whether I
use an explicit cursor or an implicit one.  Manual not too helpful in this
respect.

Any ideas?

Thanks,

Patrick Demets