[samotrak]

Yes, I did downgrade from NE to OSS. What I did is upgrade to NE and downgrade to OSS just for testing purpose.
Do you have any idea to fix this?

Actually, when I use the instance which have not been downgraded from NE to OSS, I have no problme during upgrade from 3.1.3 instance to 4.0.2 or 4.0.3.

Thanks,
samotrak