Calculated member not displaying

Question

I have a calculated member that has a case statement with many many when clauses. I have included a part of the code below. But when a member doesn't exists in the "Beginning Buildings" calculated member doesn't appear in the cube as a measure.
If I comment out the lines where the member doesn't exists then I can see the calculated member in the cube.
So on the code below if I comment out the first when clause that has [FEB Estimate] in the Edition dimension I can see the calculated member in the cube. The Edition dimension doesn't have this member anymore but since is in a CASE statement it should
not find it still display the member.
CREATE MEMBER CURRENTCUBE.[Measures].[Beginning Buildings]
AS
case
when [Dim Edition].[Editions].CurrentMember is [Dim Edition].[Editions].[Qtr].&[FEB Estimate]&[1]
then SUM([Dim Edition].[Editions].[Month].&[Year12 Actuals]&[4]&[12], [Measures].[base Buildings In Inventory])
when [Dim Edition].[Editions].CurrentMember is [Dim Edition].[Versions].[Qtr].&[Year13 Budget]&[1]
then SUM([Dim Edition].[Editions].[Month].&[Year12 Actuals]&[4]&[12], [Measures].[base Buildings In Inventory])
else
SUM([Dim Edition].[Editions].Prevmember, [Measures].[base Buildings In Inventory])
end
FORMAT_STRING
= "#,##0",
VISIBLE
= 1, DISPLAY_FOLDER = 'Building';

Answer 1

maybe I didn't explain it clearly but say I have this
case
when [Dim
Edition].[Editions].CurrentMember
is [Dim Edition].[Editions].[Qtr].&[FEB
Estimate]&[1]
then SUM([Dim
Edition].[Editions].[Month].&[Year12
Actuals]&[4]&[12],
[Measures].[base
Buildings In Inventory])
when [Dim
Edition].[Editions].CurrentMember
is [Dim Edition].[Versions].[Qtr].&[Year13
Budget]&[1]
then SUM([Dim
Edition].[Editions].[Month].&[Year12
Actuals]&[4]&[12],
[Measures].[base
Buildings In Inventory])
else
SUM([Dim Edition].[Editions].Prevmember,
[Measures].[base
Buildings In Inventory])
end
the calculated measure doesn't this play
but if I have this
case
when [Dim
Edition].[Editions].CurrentMember
is [Dim Edition].[Editions].[Qtr].&[FEB
Estimate]&[1]
then SUM([Dim
Edition].[Editions].[Month].&[Year12
Actuals]&[4]&[12],
[Measures].[base
Buildings In Inventory])
else
SUM([Dim Edition].[Editions].Prevmember,
[Measures].[base
Buildings In Inventory])
end
the calculated measure displays.
Why is that?
I have another cube that has the same type of case statement and it displays even though some case statements are not meet.