informix 游标定义错误

1  if(lfg[0]=='1')
2  {
3         EXEC SQL DECLARE cur_txlist CURSOR WITH HOLD FOR
4                SELECT * FROM gr_bus_txlist2;// ORDER BY fl_step;
5        }else if()
6        {
7         EXEC SQL DECLARE cur_txlist CURSOR WITH HOLD FOR
8                SELECT * FROM gr_bus_txlist1;// ORDER BY fl_step;               
9        }else
10        {
11                lRet = -1;
12                ERROREXIT
13        }
在编译的时候，在第7行那儿提示the name cur_txlist has already been used.
求教各位大神这是怎么回事啊，怎么解决？？？急急急~~~~~