my customer recently installed my application on their new 2012 server and automation to EXCEL stop working.
Code line loXL.Workbooks.Open(tcFile) issues error: OLE IDispatch exception code 0 from Microsoft Office Excel: Unable to get the Open property of the Workbooks class...
They have the same application running on other servers without problems.
Customer demands explanation, but i cannot understand this error.
Any help will be appreciated.

Thanks.