I have a project file that was created in V11.7 and that runs without a problem in this version.
But when I open it with Modeler V12 I get the following error message:
"Object reference not set to an instance of an object"
The data table opens but without any data in it. The lookup tables that are used can be viewed. The database to be opened is an .xlsx file.
Hope that somebody is able to help me eliminate the root cause of this error.