SQL & PL/SQL

Hi,

I am getting the error "ORA-01756: quoted string not properly terminated", on running the below script. Kindly help

set feedback off;
set define off;
set serveroutput on;
declare v_sql varchar2(4000);
v_cnt number(1);
begin 
  select count(1) into v_cnt
  from user_tables t
  where lower(t.table_name) =lower('C2P_ETL_BATCH_CONFIG'); 
  if v_cnt = 1 then 
    dbms_output.put_line (' Table C2P_ETL_BATCH_CONFIG exists');
  else
    v_sql:= 'create table C2P_ETL_BATCH_CONFIG
(
  ETL_BATCH_CONFIG_ID NUMBER(8) not null,
  ETL_BATCH_CONFIG    VARCHAR2(50),
  ETL_BATCH_FILE      VARCHAR2(150),
  ETL_BATCH_SEQ       NUMBER(2) default 1 not null,
  B_DISABLE           NUMBER(1) default 0 not null,
  FILE_PARAMETERS     VARCHAR2(250) default ''
)';
   execute immediate v_sql;

v_sql:= 'alter table C2P_ETL_BATCH_CONFIG
            add primary key (ETL_BATCH_CONFIG_ID)';
    execute immediate v_sql;

dbms_output.put_line (' Created table C2P_ETL_BATCH_CONFIG');   
  end if;
end;  
/