Top-down incremental compilation

Thanks for your reply.

I am using incremental compilation to reduce compile time and lock down modules.

In previous projects I have used the bottom-up design flow, but I think it is too complex for my current project (the whole compile, export/import, compile again). The current project is actually not very big or complex (maybe 10.000 LE and clk<10MHz), so size and speed is not a problem.

One of my goals was to make a different project for each design partition, so that all files that belonged to partition A would be in a folder A and files belonging to partition B would be in folder B. As I understand you that is not possible without using bottom-up flow!

Could I make subdirectories under my top-level project and place all my design and symbol files there – would the post-fit option then work?