SAP BW Unable to adress a Field (In a Hierarchy)

When trying to do a DISTINCTCOUNT of a field that is in a defined Hierarchy) we are always getting a error.

Any idea's

Feedback Type:Frown (Error)
Timestamp:2017-08-23T13:07:24.2082480Z
Local Time:2017-08-23T15:07:24.2082480+02:00
Product Version:2.49.4831.521 (PBIDesktop) (x64)
Release:August, 2017
IE Version:11.0.9600.18762
OS Version:Microsoft Windows NT 6.1.7601 Service Pack 1 (x64 en-US)
CLR Version:4.6.1 or later [Release Number = 394271]
Workbook Package Info:1* - en-GB, Query Groups: 0, fastCombine: Disabled, runBackgroundAnalysis: True.
Peak Working Set:579 MB
Private Memory:469 MB
Peak Virtual Memory:3.85 GB
Error MessageLE DB or ODBC error: [Expression.Error] We couldn't fold the expression to the data source. Please try a simpler expression..
Telemetry Enabled:True
Model Default ModeirectQuery
Snapshot Trace Logs:C:\Users\EXK528\AppData\Local\Microsoft\Power BI Desktop\FrownSnapShot458615073.zip
Performance Trace Logs:C:\Users\EXK528\AppData\Local\Microsoft\Power BI Desktop\PerformanceTraces.zip
Enabled Preview FeaturesBI_shapeMapVisualEnabled
Enabled DirectQuery OptionsBI_DirectQuery_Unrestricted
Error Code:QueryUserError
OData Error Message:Failed to execute the DAX query.
DPI Scale:100%
Supported Servicesower BI
Formulas:

section Section1;
shared Cube = let
Source = SapBusinessWarehouse.Cubes("xxx", "xxx", "xxx", [ScaleMeasures=false, LanguageCode="NL"]),
#"$INFOCUBE" = Source{[Name="$INFOCUBE"]}[Data],
#"$BPA_M03" = #"$INFOCUBE"{[Id="$BPA_M03"]}[Data],
#"Added Items" = Cube.Transform(#"$BPA_M03",
{
}),
AddUniqueIds = let
NewDimensions = Table.TransformColumns(Cube.Dimensions(#"Added Items"),
{
"Data",
(dimTable) => List.Accumulate(
Table.ColumnNames(dimTable),
dimTable,
(table, column) => Table.AddColumn(table, column & ".UniqueId", each Cube.AttributeMemberId(Record.Field(_, column)))
)
}),
NewCube = Cube.ReplaceDimensions(#"Added Items", NewDimensions)
in
NewCube
in
AddUniqueIds;