I access to the objects com of excel from aspx script, and I have added it into references. Normally it works perfectly, but at the time of executing there are it times that to me the error leaves that I beat down. But if I give to the menu "Build" -&#062; "Rebuild solution", the application works perfectly and compiles without problems. Somebody knows because it can be? <BR>Thanksss <BR><BR><BR>Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. <BR><BR>Compiler Error Message: CS0006: Metadata file &#039;c:windowsmicrosoft.netframeworkv1.1.4322 emporary asp.net fileseptisa5ce3ba4a20f48b27assemblydl23f2655 9d03e3bbf_0323c201interop.excel.dll&#039; could not be found <BR><BR>Source Error: <BR><BR><BR><BR>[No relevant source lines] <BR><BR><BR>http://hhdirecto.webcindario.com