internal error--insn does not satisfy its constraints.

[Mahesh D. Sadhankar]

Hi there,

I have a class say A, which has private members which are  instances
of
another class say B. when the class composition is as explained
above
then its gives following error 
internal error--insn does not satisfy its constraints:
(insn 502 33 35 (set (reg:SI 8 %o0) (reg:SI 114)) 105 {*movsi_insn}
(nil) (nil))

 and when the instances of class B is commented then its going
thru..
can you pls. tell me why it like that..???
also what shall i do to remove this error ???

Thanks..
Mahesh