There is an error of unknown origin that may destroy the model info needed for Evolve of the Admin DB of MDrivenServer.

The error shows up as:

Problem in portalpush Unknown valuetype in admin_ECO_ORMAPPING table ()

The root cause is yet unknown. The admin_ECO_ORMAPPING has been wrongfully cleared of model info.

To fix - find another MDrivenServer with the same current admin model and go to <mdrivenServer>/admin/EvolveDebugPage.aspx

Execute the "Get from Current"

Copy the resulting XML text from the Admin DB Script box.

Paste this value into the MDrivenServer with the error - Submit - then "Update Current With Given".

(This operation inserts the missing DB Script. There are other ways to do this. Download DB, use a SqlCompact tool like LinqPad, and insert the missing script. Upload model)