Copy inside EXECUTE IMMEDIATE

DECLARE
sql_txt VARCHAR2(200);
BEGIN
sql_txt:= 'COPY FROM AA/AA_at_AA TO BB/BB_at_BB REPLACE T1 USING SELECT * FROM T1;';
EXECUTE IMMEDIATE sql_txt;
END;
/

ORA-00900: invalid SQL statement
ORA-06512: at line 5

When I use the copy command without EXECUTE IMMEDIATE it works fine, but with EXECUTE IMMEDIATE I get the errors. What is wrong and how can I fix it? Received on Wed Jun 16 2004 - 13:22:12 CDT