Hi all,
I am using Erwin Data Modeler 4.1.x. I want to explain a scenario. I
have created a data model -> Created a database ffrom the data model
using forward engg. -> Made some modifications to the architecture
database -> So again recreated the data model using reverse engg.
Now How can I make sure that the model created is pertaining to the
exact changes made as I can't rely completely on the tool?
Please help me out.

Thank you......

within ERwin. You've already made fatal mistake number 1
however. Always make your changes within ERwin and then FE.
Do it that way and you'll avoid this problem.