File or assembly name System.Web, or one of its dependencies, was not found.

Question

Has anyone come across an error message that is similar to the one in the Subject box - and how did you rectify it please? It came up when I tried to run a program to create a Web Form. The program should be right, as it is from a training course and is the one that was already completed for me by the course team. Thanks, Martyn.

martyn50 · Answer

Yes, you've cracked it this time, sailorfoley! Thanks very much - I had long since given up and moved on, but I've just gone back and tried what you said and it was very satisfying not to get that blooming error message anymore! The developer was an older version than the web server, as you've correctly guessed. Regards, Martyn.

sailorfoley · Answer

Change these lines that are referenced in your web.config file: Line 68: Line 69: Line 70: Line 71: to this : Line 68: Line 69: Line 70: Line 71: i.e. take out the System.Web and the comma before it and it should be ok. Hope this helps. It looks like your using an old version of the framework either on your web server or on your development machine. If this is the case try upgrading both to a similar version and all should be ok.

martyn50 · Answer

Thanks sailorfoley, but unfortunately it hasn't. Under References, the project already has System.Web and System.Web.Services. The error is still the same. I tried changing "user" to "SYSTEM" in the processModel section of the Machine.Config file, with similarly little success. Any other ideas? This is the message that I get when I run the application: Server Error in '/WebControlsCompleted' Application. -------------------------------------------------------------------------------- Configuration Error Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. Parser Error Message: File or assembly name System.Web, or one of its dependencies, was not found. Source Error: Line 67: --> Line 68: Line 69: Line 70: Line 71: Source File: C:\Inetpub\From inetpub\WebControlsCompleted\web.config Line: 69 Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Web' could not be loaded. === Pre-bind state information === LOG: DisplayName = System.Web (Partial) LOG: Appbase = file:///C:/Inetpub/From inetpub/WebControlsCompleted LOG: Initial PrivatePath = bin Calling assembly : (Unknown). === LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind). LOG: Post-policy reference: System.Web LOG: Attempting download of new URL file:///C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/webcontrolscompleted/61faad5d/6ab5c391/System.Web.DLL. LOG: Attempting download of new URL file:///C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/webcontrolscompleted/61faad5d/6ab5c391/System.Web/System.Web.DLL. LOG: Attempting download of new URL file:///C:/Inetpub/From inetpub/WebControlsCompleted/bin/System.Web.DLL. LOG: Attempting download of new URL file:///C:/Inetpub/From inetpub/WebControlsCompleted/bin/System.Web/System.Web.DLL. LOG: Attempting download of new URL file:///C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/webcontrolscompleted/61faad5d/6ab5c391/System.Web.EXE. LOG: Attempting download of new URL file:///C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/webcontrolscompleted/61faad5d/6ab5c391/System.Web/System.Web.EXE. LOG: Attempting download of new URL file:///C:/Inetpub/From inetpub/WebControlsCompleted/bin/System.Web.EXE. LOG: Attempting download of new URL file:///C:/Inetpub/From inetpub/WebControlsCompleted/bin/System.Web/System.Web.EXE. -------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:1.1.4322.2032; ASP.NET Version:1.1.4322.2032

sailorfoley · Answer

In Visual Studio.Net right click your project and select the "Add Reference" menu. In the box that then appears on screen select System.Web This should solve your problem.

File or assembly name System.Web, or one of its dependencies, was not found.

Answers (4)