Strange compiler error when including vector

Hi,
if I try to include the stl header for vector I get the following compiler error in Borland C++ Builder 6:

'reverse_iterator' is not a member of '_STL'

The line in _vector.h where the compiler shows the error is:

_STLP_DECLARE_RANDOM_ACCESS_REVERSE_ITERATORS;

I am totally puzzled. I used stl vectors for ages and never had this error. Any idea why this is?

Thanks for any help
Sonny

Problem solved! Had the include statement accidentally inside a namespace declaration :D