Sorry, it was my fault.
it must be 
AA a;
then it is OK.
> 
> Victor
> 
> -- 
> -------------------------------------------------------------------------
> Victor M. Perevoztchikov         perev@uther1.phy.ornl.gov  [ US
>                                  perev@vxcern.cern.ch       [ CH
>                                  perev@mx.ihep.su           [ RUS
> 
> Oak Ridge National Laboratory, MS 6374, Oak Ridge, TN 37831 (423-574 5928)
>                                                        Fax  (423-576 5780)
> University of Tennessee, Knoxville, TN 37996-1200  (secre-at 423-974 3342)
> 9015 Ten Mile Rd. #209 Knoxville TN 37923                   (423-693 2639)
> 
-- 
-------------------------------------------------------------------------
Victor M. Perevoztchikov         perev@uther1.phy.ornl.gov  [ US
                                 perev@vxcern.cern.ch       [ CH
                                 perev@mx.ihep.su           [ RUS
Oak Ridge National Laboratory, MS 6374, Oak Ridge, TN 37831 (423-574 5928)
                                                       Fax  (423-576 5780)
University of Tennessee, Knoxville, TN 37996-1200  (secre-at 423-974 3342)
9015 Ten Mile Rd. #209 Knoxville TN 37923                   (423-693 2639)