Error using SELECTCOLUMNS when adding more than one column

Hi, 

I am trying to create a new table based on the existing one using SELECTCOLUMNS

When I run: 

TablaColumnasBasicas = 
SELECTCOLUMNS(
    'Manuf',
    "PipeBridge", 'Manuf'[GeneralPipeBrichColumns]
)

It works fine. 

However, when I add a second column: 

TablaColumnasBasicas = 
SELECTCOLUMNS(
    'Manuf',
    "Week", 'Manuf'[GeneralWeek],
    "PipeBridge", 'Manuf'[GeneralPipeBrichColumns]
)

I get the following error: 

"The expression refers to multiple columns. Multiple columns cannot be converted to a scalar value."

Table looks as follows: 

The table 'Manuf' is a new table I just create there are no measures or relationships yet. Column names are correct (IntelliSense
confirms them).

I tried to reduce the problem to this simplest expression, but I am stuck here.

Does anyone know Why adding a second column triggers this error?

Thanks a lot in advance!