I would like to create a Datatable from an Excelfile but I just get the following error: "Compiler error(s) encountered processing expression “DB”. ‘DB’ is not declared. It may be inaccessible due to its protection level."
you need to decalre that variable before you use it. You can do this in the variables pane or when typing into that attribute filed use ctrl +k and then type the name of the variable