OWN EXCEPTION NOT HANDLED

["rashmi" <rashmi.thoras@gmail.com>]

Dear reader

Inside a function I defined an exception of my own that is equivalent
to an exception of  constraint- error type. I have also created the
associated exception handler as shown next:
_________________
    :
if RE_ScDSGA.IN_RanSeq <  0   then raise EX_RsqIvd; end if;
if RE_ScDSGA.IN_RanSeq >  1   then raise EX_RsqIvd; end if;
    :
    :
exception
    when EX_RsqIvd => put_line("EXCEPTION: Invalid key INPUT for random
seq");
return RE_ScDSGA;
    :
___________________

There were no compiler errors or warnings. Now when a value of 2 was
supplied for the field variable IN_RanSeq, a constraint error would be
expected. But instead of handling this constraint error as I have
defined above, Ada handled it on its own by raising Constraint_Error.

My question is how do I get Ada to handle the constraint error from my
own handler rather than from the handler of its own?