大家来找茬，运行报错！为啥？求指导！

在行: 2 上开始执行命令时出错 -
DECLARE
--系的光标
cursor cdept is select dno,dname from dep;
pdno dep.dno%type;
pdname dep.dname%type;
--成绩光标
cursor cgrade(coursename varchar2,depno number)  is  select  grade from sc where cno=(select cno from course where cname=coursename)
                and sno in (select sno from student where dno=depno);
               
      pgrade sc.grade%type;
      count1 number;
      count2 number;
      count3 number;

    avggrade number;
      pcourseName varchar2 := '大学物理';
     
    begin  
    open cdept;
    loop
    --取一个系的信息
              fetch cdept into pdno,pdname;
    exit when cdept %notfound;
    --初始化工作
    count1:=0;count2:=0;count3:=0;
   
    --系的平均成绩
    select avg(grade) into avggrade from sc where cno=(select cno from course where cname=pcoursename)
                and sno in (select sno from student where dno=pdno);
                --取系中，选修了大学物理的学生成绩
      open cgrade(pcoursename,pdno);
      loop
      fetch cgrade into pgrade;
      exit when cgrade%notfound;
      if pgrade < 60 then count1:=count1+1;
      elsif pgrade >=60 and pgrade <85 then count2:=count2+1;
    else count3:=count3+1;
    end if;
     
      end loop;
     
      close cgrade;
    insert into msg1 values ( pcoursename,pdname,count1,count2,count3,avggrade);
   
   
    end loop;
   
    close cdept;
   
    COMMIT;
    dbms_output.put_line('统计完成');
    end ;
     
     
错误报告 -
ORA-06550: 第 16 行, 第 19 列:
PLS-00215: 字符串长度限制在范围 (1...32767)
06550. 00000 -  "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action: