Invalid URI: The format of URI cannot be determined

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ASP.NET

Hi Experts, Iam working on visualStudio 2003 and iam gettting the below error.The method LoadCalcScriptFromServer() at line 665 below accepts only a string value.But when i run the application it is expecting in URI Format.Any help would be appriciated.

Invalid URI: The format of the URI could not be determined.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.UriFormatException: Invalid URI: The format of the URI could not be determined.
Source Error:

Line 663:			try
Line 664:			{
Line 665:				gridAdapterOWC112.DataServer.EssCalculation.LoadCalcScriptFromServer("AggFcst");
Line 666:			}
Line 667:			catch(Hyperion.Objects.Essbase.Common.EssException ex)
 
Source File: c:\inetpub\wwwroot\essweb1\webform1.aspx.cs    Line: 665 
Stack Trace: 

[UriFormatException: Invalid URI: The format of the URI could not be determined.]
   System.Uri.Parse() +545
   System.Uri..ctor(String uriString, Boolean dontEscape) +191
   System.Uri..ctor(String uriString) +7
   System.Net.WebRequest.Create(String requestUriString) +29
   Hyperion.Objects.Essbase.Common.Transports.HttpTransporter.SendAndReturnRequest(XmlDocument xmlRequest, String endPoint, IWebProxy proxy) +37
   Hyperion.Objects.Essbase.Common.WebServiceBase.PostAndReturnSOAP(String operation, XmlDocument xmlRequest, IClientProtocol clientProtocol) +186