Q:

how to avoid the error "Category member XXX defined as an empty set" in icCube? 

I've got the following MDX code to create a category dimension with 4 members:

all members that make up of 0-50% of the measure (TopPercent)
members 50-80%
members 80-95%
members 95-100%

The code works perfectly on levels with a lot of members:
WITH
MEMBER [measures].[v] as eval([Tijd].[Tijd].[jaar].[2018],[Measures].[Bedrag])

set [selection] as Order( nonempty([Categorie].[Categorie].[categorie].members,[measures].[v]), [measures].[v], BDESC)  

CATEGORY HIERARCHY [Stats].[ABCD], DEFAULT_MEMBER_NAME = "Totaal", LEVEL_NAME_PATTERN="L - ABCD - ${levelDepth}"
CATEGORY MEMBER [Stats].[ABCD].[Totaal].[A (0-50%)] as
     TopPercent([selection],50, [measures].[v] ), ADD_CHILDREN=true
CATEGORY MEMBER [Stats].[ABCD].[Totaal].[B (50-80%)] as
    TopPercent([selection],80, [measures].[v] )
    - TopPercent([selection],50, [measures].[v]), ADD_CHILDREN=true
CATEGORY MEMBER [Stats].[ABCD].[Totaal].[C (80-95%)] as
    TopPercent([selection],95, [measures].[v])
    - TopPercent([selection],80, [measures].[v] ), ADD_CHILDREN=true
CATEGORY MEMBER [Stats].[ABCD].[Totaal].[D (95-100%)] as
    Order([selection], [measures].[v], BDESC)
    - TopPercent([selection],95, [measures].[v]), ADD_CHILDREN=true

SELECT
// Measures
{[measures].[v]} On 0,
// Columns    
[Stats].[ABCD].[L - ABCD - 1].members on 1,
// Rows   
[Stats].[ABCD].[L - ABCD - 2].members on 2
FROM (select  [Tijd].[jaar].[2018] on 0 from [Spendzoom])
/*ic3navigation*/

But when I run the MDX code with:
set [selection] as Order( nonempty([Categorie].[Categorie].[type].members,[measures].[v]), [measures].[v], BDESC)  

I get the error: Category member "[Stats].[ABCD].[Totaal].[C (80-95%)]'defined as an empty set. 
I have tried to rewrite the definitions, as:
subcubeminus(TopPercent .... , TopPercent)

But that gave completely strange results. 
How can I overcome this error and have a generic approach that allways works regardless of the contents of the hierarchy & level in the [selection] definition? 

A:

As ic3 mentioned in the comments, as of icCube 6.8.10, icCube allows now to have empty categories.  Y
For me this means, business wise, that regardless of the global filter settings the categories ALWAYS work.  In case it is an empty set, it results a blank value in the dashboards.  

example of a Parato analysis for just 1 vendor (bedrag = amount, #Fact = nr of invoices, #Lev = nr of suppliers)

Exactly as desired. 