BW Post Upgrade 3.5 - Scenario with BW system not connected to R/3

We have decided to upgrade our PRD BW (call it "BWP") in the following scenario:
1. DB copy from BWP to BWP2;
2. BWP2 keeps the connection with R/3 source system as well as users (data loads are done in this system during the upgrade to minimize downtime);
3. In BWP, RFC connection to R/3 is changed (dummy host) to avoid overlapping problems with extracts: no data loads are done in BWP since the DB copy (1);
4. Upgrading BWP to BW3.5
5. New init delta loads on BWP
Could there be any problems with this scenario (in the postupgrade stage) due to the fact that the connection with R/3 is not really active (I think for instance about transaction SGEN which could yield problems)?
Thanks for your feedback.
LauQ.

Hi,
A few comments for your steps:
2. You need to change the RFC destination in R/3 to point to BWP2.
5. You will need to do a few more things in BWP to reconnect it (if you want to keep BWP2). These include changing the logical system name and deleting/recreating the R/3 source system [make sure you have a dummy RFC host for the deletion], and re-transport datasource related objects.
If you plan to delete BWP2 and re-use BWP, then you need to delete the old transaction data and reload after re-connecting. You will also need to move any changes made to BWP2 to BWP. Also you need to re-synch the master data too!
SGEN is no issue.
One thing that will help with the upgrade prep, ensure all transfer structures and rules are active before the copy and switch over. You will only have the option to delete them when you have the dummy host entry.
I hope this helps,
Mike
I hope this helps,
Mike.

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BW Post Upgrade 3.5 - Scenario with BW system not connected to R/3

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