Re: Throwing exceptions

I am supposed to throw some exceptions in myVector class but when I
impliment them I get an error saying

myVector.h:139: error: looser throw specifier for `myVector&
myVector::popFront(T&) [with T = int]'
myVector.h:17: error: overriding `containerInterface&
containerInterface::popFront(T&) throw (BADINDEX) [with T = int]'

What is wrong with the way that I am throwing my exceptions in my
functions in the myVector class?

here is the .h

#ifndef _MYVECTOR
#define _MYVECTOR

using namespace std;

class BADINDEX {};

template <class T>
class containerInterface
{
public:

[..]
virtual containerInterface <T>& popFront(T&) throw (BADINDEX) = 0;

[..]
};

template <class T>
class myVector: public containerInterface<T>
{
[..]
myVector <T>& popFront (T& n)

{
if(isEmpty())
{
throw (BADINDEX());
}
n = data[0];
shiftLeft();

return *this;
}
[..]
};

#endif