Hi, i have an Existing Excel file that i use as Template for creating Excel files from within my program.
there are named ranges in it that i use to fill it with data.
in the hope that it will be a much faster way i went to OpenXML and now found closedXML, but the first line i wrote
var wb = new XLWorkbook("EAV_VU-Daten_Master.xlsx");
lead to the mentioned error.
any help ? (i could send you the Xlsx to somewhere if you need it to find the error)