I'm getting an error what Duse it mean.

AssemblyVersion: 04.05.05
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL: /Forum/tabid/57/www.Domain.net/Forum/tabid/57/forumid/2/scope/threads/www.Domain.net/Forum/tabid/57/forumid/3/scope/threads/www.Domain.net/Forum/tabid/57/forumid/1/scope/threads/www.Domain.net/Forum/tabid/57/forumid/3/scope/threads/Default.aspx
AbsoluteURL: /Forum/tabid/57/www.Domain.net/Forum/tabid/57/forumid/2/scope/threads/www.Domain.net/Forum/tabid/57/forumid/3/scope/threads/www.Domain.net/Forum/tabid/57/forumid/1/scope/threads/www.Domain.net/Forum/tabid/57/forumid/3/scope/threads/Default.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 53cc7ebf-2b2f-44bd-936a-985bd20a3b69
InnerException: Unhandled Error:
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.IO.Path.NormalizePathFast
StackTrace:
Message: System.Exception: Unhandled Error: ---> System.IO.PathTooLongException: The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters. at System.IO.Path.NormalizePathFast(String path, Boolean fullCheck) at System.IO.Path.GetFullPathInternal(String path) at System.Security.Util.StringExpressionSet.CanonicalizePath(String path, Boolean needFullPath) at System.Security.Util.StringExpressionSet.CreateListFromExpressions(String[] str, Boolean needFullPath) at System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, AccessControlActions control, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList) at System.Web.InternalSecurityPermissions.PathDiscovery(String path) at System.Web.HttpRequest.get_PhysicalPath() at DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) --- End of inner exception stack trace ---
Source:
Server Name: MyServer

Is there any way to stop the googlebot.