If your certain that your Links module is version 04.01.00 (downloaded from dnnlinks project on CodePlex) and not version 04.00.01 (included within DotNetNuke framework version 5.2.1 and earlier), please note that version 04.01.00 is still in beta status. A beta version should be used for testing purposes only as it may not be upgradable to the final release when it becomes available nor to later releases.

If you installed version 04.01.00 as an upgrade from an earlier version of the links module, there is a good chance that the upgrade did not remove two assemblies from your site's /bin folder - DotNetNuke.Modules.Links.dll and DotNetNuke.Modules.Links.SqlDataProvider.dll thus causing these errors.

After verifying that your Links module is the beta version 04.01.00, please delete both of the above mentioned .dll files from your site's /bin folder. If you find that your Links module is actually the last official release, 04.00.01, DO NOT delete the two .dll files. We will then need to look elsewhere for the solution.

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Bill, WESNet Designs
Team Lead - DotNetNuke Gallery Module Project (Not Actively Being Developed)
Extensions Forge Projects . . .
Current: UserExport, ContentDeJour, ePrayer, DNN NewsTicker, By Invitation
Coming Soon: FRBO-For Rent By Owner

I have also discovered the same issue with two websites that have the Links 04.01.00 module installed.
Any help to rectify this issue would be greatly appreciated.

System Information:
DNN 5.1.4
Links 04.01.00 - 0544 – BETA

The following files were not present in the Bin folder or any other folder on the site:
DotNetNuke.Modules.Links.dll
DotNetNuke.Modules.Links.SqlDataProvider.dll

The following two errors appear in the log file (event viewer) multiple times per day:

24/08/2010 6:11:39 PM   General Exception       AssemblyVersion: 5.1.4; PortalID: -1; PortalName ...  ...

AssemblyVersion: 5.1.4 PortalID: -1 PortalName: UserID: -1 UserName: ActiveTabID: -1 ActiveTabName: RawURL: AbsoluteURL: AbsoluteURLReferrer: UserAgent: DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider ExceptionGUID: 0fa66f1a-06fa-4cf0-b3d8-3b012e7b0431 InnerException: Error Creating BusinessControllerClass 'DotNetNuke.Modules.Links.LinkController, DotNetNuke.Modules.Links' of module(DNN_Links) id=(627) in tab(144) and portal(0) FileName: FileLineNumber: 0 FileColumnNumber: 0 Method: System.Activator.CreateInstance StackTrace: Message: System.Exception: Error Creating BusinessControllerClass 'DotNetNuke.Modules.Links.LinkController, DotNetNuke.Modules.Links' of module(DNN_Links) id=(627) in tab(144) and portal(0) ---> System.ArgumentNullException: Value cannot be null. Parameter name: type at System.Activator.CreateInstance(Type type, Boolean nonPublic) at DotNetNuke.Framework.Reflection.CreateObject(String TypeName, String CacheKey) at DotNetNuke.Services.Search.ModuleIndexer.GetModuleList(Int32 PortalID) --- End of inner exception stack trace --- at DotNetNuke.Services.Search.ModuleIndexer.GetModuleList(Int32 PortalID) Source:

24/08/2010 6:11:39 PM   General Exception       AssemblyVersion: 5.1.4; PortalID: -1; PortalName ...  ...

AssemblyVersion: 5.1.4 PortalID: -1 PortalName: UserID: -1 UserName: ActiveTabID: -1 ActiveTabName: RawURL: AbsoluteURL: AbsoluteURLReferrer: UserAgent: DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider ExceptionGUID: 6ee0b9f0-e5f8-4a98-ae58-992bf0f281f2 InnerException: Could not load file or assembly 'DotNetNuke.Modules.Links' or one of its dependencies. The system cannot find the file specified. FileName: FileLineNumber: 0 FileColumnNumber: 0 Method: System.RuntimeTypeHandle._GetTypeByName StackTrace: Message: System.IO.FileNotFoundException: Could not load file or assembly 'DotNetNuke.Modules.Links' or one of its dependencies. The system cannot find the file specified. File name: 'DotNetNuke.Modules.Links' at System.RuntimeTypeHandle._GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName) at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) at System.RuntimeType.PrivateGetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) at DotNetNuke.Framework.Reflection.CreateType(String TypeName, String CacheKey, Boolean UseCache, Boolean IgnoreErrors) WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. Source: Server Name: ZONDA