Error snaptshot to excel on TM1 10.1.1 contributor

[mangphung]

for TM1 10.1.1 FP1

I can't snapshot to excel for all node on contributor by suppress zero on column because of there're some node do not have any data.
And then TM1Web.log returned error below:

ERROR Applix.TM1.Web.WebControls.Export.Looping.TM1Looper - exception in export looper thread
System.NullReferenceException: Object reference not set to an instance of an object.
at Applix.TM1.API.Internal._TM1Val.getArrayVal(Int32 ix)
at Applix.TM1.Web.WebControls.CubeViewer.TM1ViewPageData.FetchCellAnnotationStatuses(Int32 startrow, Int32 startcolumn, Int32 endrow, Int32 endcolumn, Int32 pageRows, Int32 pageColumns)
at Applix.TM1.Web.WebControls.CubeViewer.TM1ViewPageData.FetchPageData()
at Applix.TM1.Web.WebControls.CubeViewer.TM1CubeView.GetViewPageData(Int32 iCurRowstart, Int32 iCurColstart)
at Applix.TM1.Web.WebControls.CubeViewer.TM1CubeView.GetViewArrayData()
at Applix.TM1.Web.WebControls.Export.Looping.TM1Looper.GenerateSheetsForCubeview(Int32 loopIdx)
at Applix.TM1.Web.WebControls.Export.Looping.TM1Looper.ExportThread()

How can I fix it ??