Is it permissions? Your service will either be running under the Local
System account, or you will have specified it to use another account. If it
is running under Local System then try assigning another username to it (in
the Services applet in Administrative Tools).

Alternatively, is excelPhysicalFilePath pointing at a mapped drive? Mapped
drived do not exist from a service's perspective.

--
Alan Moseley IT Consultancy
http://www.amitc.co.uk

If I have solved your problem, please click Yes below. Thanks.


"dragonemp" wrote:

I have a service app that create excel spreadsheet automatically. this worked
on xp and windows server 2003. but now i need it work on windows server 2008.
When the service run to this line:
_workBook.SaveAs(excelPhysicalFilePath,Excel.XlFil eFormat.xlWorkbookNormal,null,null,false,false,Exc el.XlSaveAsAccessMode.xlExclusive,false,false,null ,null,null) ;
it always returns error "System.Runtime.InteropServices.COMException
(0x800A03EC): Exception from HRESULT: 0x800A03EC"

however, I also has an windows form test app which runs exact same code, but
it works. So i wonder maybe the error is related to some new restriction
implemented for service/DCOM in windows server 2008, can somebody give me
some idea how to solve it?