Microsoft MDX tutorial: source structure column not found - tsql

Question

I am in the process of learning about Microsoft's Analysis Services for SQL Server 2012. Having gone through the basic AdventureWorks tutorial using the VisualStudio 2012 plugins, I am now trying my hand at executing these same procedures using the DMX Query language.
The tutorial I am refering to can be found here:
http://msdn.microsoft.com/en-us/library/4b634cc1-86dc-42ec-9804-a19292fe8448(v=sql.110)
The Database project I am using in the Analysis Server is that of the BasicDataMining project as can be found upon the completion of the BasicDataMining tutorial here:
http://msdn.microsoft.com/en-us/library/ms167167(v=sql.110).aspx
The first lesson in the DMX tutorial goes well having used the following query to create the Mining Structure:
CREATE MINING STRUCTURE [Bike Buyer]
(
[Customer Key] LONG KEY,
[Age]LONG DISCRETIZED(Automatic,10),
[Bike Buyer] LONG DISCRETE,
[Commute Distance] TEXT DISCRETE,
[Education] TEXT DISCRETE,
[Gender] TEXT DISCRETE,
[House Owner Flag] TEXT DISCRETE,
[Marital Status] TEXT DISCRETE,
[Number Cars Owned]LONG DISCRETE,
[Number Children At Home]LONG DISCRETE,
[Occupation] TEXT DISCRETE,
[Region] TEXT DISCRETE,
[Total Children]LONG DISCRETE,
[Yearly Income] DOUBLE CONTINUOUS
)
WITH HOLDOUT (30 PERCENT or 1000 CASES)
When I arrive at the second lesson however the suggested query does not work:
ALTER MINING STRUCTURE [Bike Buyer]
ADD MINING MODEL [Decision Tree]
(
CustomerKey,
[Age],
[Bike Buyer] PREDICT,
[Commute Distance],
[Education],
[Gender],
[House Owner Flag],
[Marital Status],
[Number Cars Owned],
[Number Children At Home],
[Occupation],
[Region],
[Total Children],
[Yearly Income]
) USING Microsoft_Decision_Trees
WITH DRILLTHROUGH
Providing the following error:
Error (Data mining): The 'CustomerKey' source structure column for the 'CustomerKey' mining model column was not found.
I am puzzled as how to solve this and why literal queries from Microsoft's own tutorial do not seem to work.
I would greatly appreciate any insights that can help me resolve this problem and proceed with this tutorial.

Answer 1

ALTER MINING STRUCTURE [Bike Buyer]
ADD MINING MODEL [Decision Tree]
(
**[Customer Key]**, <-- Missing space was the issue
[Age],
[Bike Buyer] PREDICT,
[Commute Distance],
[Education],
[Gender],
[House Owner Flag],
[Marital Status],
[Number Cars Owned],
[Number Children At Home],
[Occupation],
[Region],
[Total Children],
[Yearly Income]
) USING Microsoft_Decision_Trees
WITH DRILLTHROUGH