Hi,

I am doing a test upgrade of a DNN4.1 site with the aim to get it to 5.2.2. I tried upgrading in one step, but received various undocumented errors in the upgrade report page, so decided to do it in two steps (4.1 -> 4.9.5; 4.9.5 -> 5.2.2), which I heard was the recommended way to do it.

The first step (4.1 -> 4.9.5) worked, but produced errors in the 04.07.00 and 04.09.00 upgrade steps: the same each error each time "DotnetNuke.config missing". Nevertheless, the site seemed to work, so I went on to the second conversion step.

This time the upgrade report page showed no errors, but when I clicked on the "Click here to access portal" link, the home page showed an error.

Looking in the EventLog table, I retrieved this error:

<LogProperties><LogProperty><PropertyName>UpgradeNet</PropertyName><PropertyValue>Upgrade to .NET 3.5 failed.</PropertyValue></LogProperty></LogProperties>

Curious, in web.config, the customErrors tag is set to "off", but the home page shows no stack trace, as I would have expected.

The machine on which I am carrying out the upgrade has .NET 3.5 correctly installed, and other DNN5.2.2 sites work correctly.

Any help appreciated.