Problem with carry reusing RPM with ISE 6.2i and VirtexE

[yvan.eustache1@etud.univ-]

Hi

First, excuse me for my english, Im a french student.

Then, I have problems to reuse RPM with ISE 6.2i and VirtexE :

I have cut a project in macros which are relationnaly placed.
I want to reuse those macros in another project but the Translate
shows me errors :
------ERROR:NgdBuild:753 - Line 3 in 'emis.ucf': Could not find
instance(s)
'b_emisq/b_opp/Madd_s_inst_cy_34' in the design. To suppress this
error
specify the correct instance name or remove the constraint.
or
------ERROR:NgdBuild:753 - Line 4 in 'emis.ucf': Could not find
instance(s)
'b_emisq/b_opp/Madd_s_inst_sum_34' in the design...
....

The carry logic and sum logic make errors because (I think) during the
resynthesise of the macros ISE changes the name of carry logic and sum
logic.

There's no error with the others logic, and I can reuse all macros
which have no carry chain.

Do you know those errors and how I can resolve them ?

Thank you

Yvan EUSTACHE