2014-01-05 10:23:12,926 [YDAWBH104][Thread:13][ERROR] DotNetNuke.Services.Exceptions.Exceptions - System.IO.IOException: The process cannot access the file 'D:\HostingSpaces\PHerau\appsontabs.com\wwwroot\Portals\4\Cache\Pages\433_C455F9F654215AFC4B4AC3AC0F05D26C.data.resources' because it is being used by another process.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
   at System.IO.File.WriteAllBytes(String path, Byte[] bytes)
   at DotNetNuke.Services.ModuleCache.FileProvider.SetModule(Int32 tabModuleId, String cacheKey, TimeSpan duration, Byte[] output)
2014-01-05 10:32:32,769 [YDAWBH104][Thread:13][FATAL] DotNetNuke.Framework.PageBase - An error has occurred while loading page.
System.Web.HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ---> System.Web.UI.ViewStateException: Invalid viewstate. 
	Client IP: 81.243.102.60
	Port: 50621
	Referer: http://www.health-science.be/Shop/tabid/179/ProdID/4/Language/nl-BE/Lipidbalance.aspx
	Path: /Default.aspx
	User-Agent: Mozilla/5.0 (iPad; CPU OS 7_0_4 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11B554a Safari/9537.53
	ViewState: 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...
   at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
   at System.Web.UI.ViewStateException.ThrowMacValidationError(Exception inner, String persistedState)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
   at System.Web.UI.Page.LoadAllState()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2014-01-05 10:32:32,816 [YDAWBH104][Thread:13][ERROR] DotNetNuke.Services.Exceptions.Exceptions - DotNetNuke.Services.Exceptions.PageLoadException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ---> System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ---> System.Web.UI.ViewStateException: Invalid viewstate. 
	Client IP: 81.243.102.60
	Port: 50621
	Referer: http://www.health-science.be/Shop/tabid/179/ProdID/4/Language/nl-BE/Lipidbalance.aspx
	Path: /Default.aspx
	User-Agent: Mozilla/5.0 (iPad; CPU OS 7_0_4 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11B554a Safari/9537.53
	ViewState: M8BBjHAW/czFR87STSOsU0eELRwG5yUhUFQBAq7JuyNmx0M02G9f4zcX/gUmaTVG4eBG5xrX9zgErtPp4T8cWZHUr2gKOBsuL1FL3f+3KRqYjEFScSMmhk9lTVAqBeKbRvLOF+Z/NNxuMBSBalx79V+YFxOHTy3Z62XXBLU9dFDpCqKBSIj9cO98XfaI85PBkZTox28ESKv982Etw/iQdj0aLFQY1V8TyFZ4vv8mLpTRcEESszxN4b5N1lT4a9GCxfKX/mnOiV4lhlwMzoVo2Dm23ICRjqr95YLyIC0VVhXe500e8TLTjsc+uW1DZHiPASZ7R+XBrubUZteCH6DilB36P1lVj8TRxLF2lHtE9YG1QGBzmkwIbAsUOpH9W/RPkk5iET/YFheZm6r/a+Fyfb6kWN6TO0lmBAP/ZPwYNNhS5HqUA9SdwTR2cmJ55MMebOHoEoodqhunqWvs/WRlToXC2bJz81JdNE9K4dhOo0U7xyLA3Jz53gdpYVb0a5d/8zP5GLOQfGMTd6XcR5jQnExnfl4Yn2FqKOXxf9TuanvTSpCngxLVzyr8V4ifeZ+UFW4ZYl5PHG5JYtre9pjbKsOF7SGi8nFgB04z0yJsYDaOgv+I4Ar8qpKH2fqvUSudTcgnDppuXq8sXUqc5BonCdvYpJQWiRWP3ONGcERDvvUGplOCXfVrh7HgctljKak...
   --- End of inner exception stack trace ---
   at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
   at System.Web.UI.ViewStateException.ThrowMacValidationError(Exception inner, String persistedState)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
   at System.Web.UI.Page.LoadAllState()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   --- End of inner exception stack trace ---
2014-01-05 23:26:00,769 [YDAWBH104][Thread:63][FATAL] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - System.Web.HttpException (0x80004005): The file '/nl-be/science.aspx' does not exist.
   at System.Web.UI.Util.CheckVirtualFileExists(VirtualPath virtualPath)
   at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
   at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
   at System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound)
   at System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp)
   at System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath)
   at System.Web.UI.PageHandlerFactory.GetHandler(HttpContext context, String requestType, String virtualPath, String path)
   at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)