[fptex] is there a conflict between the hyperref package and the xr package?

[Luis A Escobar]

I have an application in which I need both hyperref and xr but
  when I run  LaTeX on my file I get a message like this

(c:/TeX/texmf/tex/latex/hyperref/nameref.sty) (./test.out) (./test.out)
! Argument of \@fifthoffive has an extra }.
<inserted text>
                \par
l.9 This line refers to~(\ref{assi01.academicians}
                                                  ).
?

However, if I don't include the hyperref package,  the problem
disappear.

I am enclosing a short test case where you can see the problem.
In the test case, I don't make use of hyperref (I just include it which is
enough to generate a problem). Unfortunately,
 in the real situation I need both packages.

Thank you for any help

 Regards, Luis A.


(See attached file: otheraux.aux)(See attached file: test.log)(See attached file: test.tex)

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