From the Microsoft Dynamics AX Blogs: AX 2012 R2 In-Place Upgrade; Baseline Database; Surrogate Keys; Financial Dimension Set Deadlocks

AX 2012 R2 In-Place Upgrade - Sometimes during the Data Upgrade Checklist the Detect Update Scripts step does not prepare any scripts to run:  The "Detect update scripts (Required)" is the first part of the Data upgrade section in the checklist, the Dynamics AX support team says in a new blog post.

"If you get the following warning ‘Data Upgrade mode had already been initialized. If additional updates have been installed complete the data upgrade process for the previously installed updated before restarting the process for any additional updated' then when you for the first time click on the ‘Detect update scripts (Required)' step in the Data Upgrade Checklist, you will have problems as the required data upgrade scripts are not prepared.

Typically you will not see the ‘Presynchronize (required)' task."

However, the team says this is only a problem when you run this step for the first time. They say the warning message is a normal message when you've already finished the data upgrade.

You can read more about the problem here.

Create a New Baseline Database for AX 2012: In "Yet Another Dynamics AX Blog," Tommy Skaue says the Baseline database in AX2012/AX2012R2 is optional when installing the database(s). The Baseline database only gets installed during installation of Dynamics AX. So what if you need to set up a Baseline database after you've already installed AX2012?

"If you have a Baseline database laying around, you could restore ...