Exception HResult 0x800a03ec when trying to open Excel with Microsoft.Office.Interop.Excel.Workbooks.Open()

Question

Following Exception is thrown if I try to open an excel file on a client machine:

Exception from HRESULT: 0x800A03EC

Inner Exceptions: (emp

Answer 1

Before trying this solution be sure that you read the "Things I've done" paragraph from the question (and tried what applies to you)

The Exception was thrown upon opening the Document; on the machine which generated the Excels, the files were generated invalid.

The solution was to change the Format of the numbers.

Go into System Configuration -> Time, Language and Region -> Language

Tap on the highlighted Hyperlink

Open Advanced Settings

Change the delimiter to a point "."