Recently I built a Project Server 2010 SP2 environment, and wanted to add a older content db. The database added fine in Central Administration, but I had an issue with the following error when trying to upgrade the database using the following command;
PSConfig.exe –cmd upgrade –inplace b2b –wait –force
The error I had was as follows;
Configuration of SharePoint Products failed. Configuration must be performed before you use SharePoint Products
To get around this, I ran the following command;
stsadm -o setproperty -pn command-line-upgrade-running -pv Yes
I then re ran the upgrade command, and it worked fine. I believe this fix can be applicable to Project Server 2013 as well.