I've been working in the migration BI from version 3.1 to version 4.1.
Usually to migration the BI content I export it with the "Import Wizard" and then import it in the new system with the UMT (Upgrade Manament Tool).
Maybe you are asking why don't I migrate in a "live-to-live" way. The answer is because, usually the new systems are in "isolated networks".
But so far, so good.
My question to you is: Have you ever need to install a new system platform (BO version 4.1 SPx) and import data from the same major version (with smaller SP)?
At first I thought using UMT, because the systems are in different network.
But according SAP documentation, I cannot use UMT to perform this kind of upgrade.
"You cannot export a BIAR file generated using the BI platform 4.x upgrade management tool into another 4.x deployment. Use the promotion management application in the Central Management Console (CMC) to promote content between two 4.x deployments."
But another problem is that my FRS have some GBs of data.
In this case, I don't think the best way is to create the LCMBIAR with the PMT.
What would you suggest?