Problems faced while using MicrosoftOfficeInterop

Question

We are developing a windows program solution in which we programmatically access the Excel functionality and control the behaviour of the *.xlsx files. 
We are using
 Visual Studio 2012 Professsional,
 Language C# 
 Namespace Microsoft.Office.Interop.Excel.
 Functions being used are standard functions  like 
ExcelApp.Workbooks.Open(…….)
WorkBook.Save(..)
WorkBook.Close(..) etc.
To control behaviour of .xlsx files, We are also using events like 
BeforeClose
BeforeSave
BeforePrint   etc 
On few systems (operating systems Windows 7 and above with Microsoft Office 2010 and above) we are facing problems. It gives exception with exception message as  “HRESULT: 0x800AC472”.  This exception is raised randomly (i.e. if it is raised while
using WorkBook.Save(..) but few seconds  before this , same file is successfully saved at same machine and same path. OR if it is raised while using ExcelApp.Workbooks.Open(…….), the same was successful just before few miliseconds.)
We know one instance where it is expected to happen. If we are working on a machine where the office installed is a trial version (i.e. the Product Key id is not entered during installation), the above problem is known to happen. But it disappears immediately
after we feed the Product key. The Program behaves perfectly.
But on few machines where the windows is properly installed and the Office is also properly installed, the above mentioned problem is faced and we are not able to locate why the problem occurs.
Can you guide us to locate  the problem and overcome the same?

Answer 1

Hi Mukund,
The
Excel for Developers forum is a better place for Office development questions. Please feel free to open a new thread at there.
Thank you for your understanding.
Best Regards,
Franklin
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