Invalid characters in the path.

[ArgumentException: Caracteres no válidos en la ruta de acceso.]
   System.Security.Permissions.FileIOPermission.CheckIllegalCharacters(String[] str, Boolean onlyCheckExtras) +12810567
   System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, AccessControlActions control, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList) +79
   System.Security.Permissions.FileIOPermission..ctor(FileIOPermissionAccess access, String path) +67
   System.Web.InternalSecurityPermissions.PathDiscovery(String path) +34
   System.Web.HttpRequest.get_PhysicalPath() +43
   GeneXus.Http.HttpModules.GXStaticCacheModule.context_EndRequest(Object sender, EventArgs e) +82
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +144
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +50
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +73