CREATE ASSEMBLY Failed Because It Could Not Open The Physical File (The Device Is Not Ready.).

I have a simple class libarray that I have compiled into DLL using csc.exe

Source code is as follows: -



using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using Microsoft.SqlServer.Server;



namespace RTFTextParser

{

public class ParseText

{

[SqlFunction(DataAccess = DataAccessKind.None)]

public static String ParseRTFText()

{

return "Imtiaz";

}

}

}

When I try to run the following

CREATE ASSEMBLY RTFTextParser FROM 'E:Class1.dll'

I get the following error

Msg 6501, Level 16, State 7, Line 1

CREATE ASSEMBLY failed because it could not open the physical file 'E:Class1.dll': 21(The device is not ready.).