Migration from SQL 2000 to Oracle 10g

Hi every one,
This is the first i am posting to this forum.
I have a problem in migration of Sql Server database to Oracle 10g.
We use Microsoft Navision Axapta 3.0 SP4 as front end.
and Sql Server 2000.
All table and indexes are created in sql server by Navison only.
My Database size is 300 GB and now we face thousands of Problem with SQL server so we decided to make a intelligent move to oracle 10g.
As we have 1200+ users.
The problem i am facing when i tranfer all the table to my Oracle Database it gives a error out of buffer.
some time it gives me error about the index as few of our developer have create two indexex on one field.
So oracle identifies that there are two indexes on one field.
So pls help how can i solve this problem.
I have 1234 tables.
from
Mohd Sufian

Can you post the exact Oracle error you are getting? The ORA-xxxxx part is the most important for us to identify what particular problem(s) you're having.
Is your front-end certified to use an Oracle database? Particularly if the front end is creating database objects, it needs to know how to work with whatever database it is connecting to.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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