I am still trying to figure that Calculated Measure stuff and I hope to learn from you. I have several cubes I am trying to create calculated measures using the Calculated Member Expression.

I have a cube called Cards. There is a measure called count that give total cards count of 15,000. There are two dimensions I am considering. One is the CreditGrade (A, B, C, D, nograde) and the other is the date of the scoredate.(2000-2015).

The CreditGrade dimension has two hierarchies. H1 being the creditnumber and H2 being the CreditGrade (The one I need).

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I have 3 simple tables:  Encounter, Patient and Immunizations.  Encounter makes  a reference to Patient, and Patient contains a list of Immunization objects.  

I've tried using PowerBI to access IRIS (using ODBC connector, not InterSystems BI connector),  PowerBI reports the error:

Expression.Error: The column 'Patient' of the table wasn't found.

it does this for two of the three tables I need only (Patient and Encounter), but not for Immunization IRIS table.. 

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