Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE))

Question

I am trying to convert a .xls file to an .xlsx file on the server-side using Microsoft.Office.Interop.Excel.Workbook class as follows:

 workBook         


        

Answer 1

I found the solution elsewhere.

Doing the following did solve my problem:

Using DCOMCNFG.exe. Open it and go to: Component Services -> Computers -> My Computer -> DCOM Config -> Microsoft Excel Application. Open the properties, select Identity tab and select the interactive user.

BUT - the problem came back every few minutes !

After hours of trying to figure out the cause, I noticed my server had hundreds of opened WINWORD.EXE processes. This caused a memory issue which leaded to the exception from hresult 0x80080005 error.

Well, stupidly enough, I forgot to write the code to close the interop application. Once I fixed that, the error was gone.

doc.Close(false);
Marshal.ReleaseComObject(doc);
word.Quit();
Marshal.ReleaseComObject(word);