Add Data Column - Error Message: Object reference not set to an instance of an object

[Jedi_Training (DJ)]

Hi There,
I’m doing training academy Practice 1 - Workbook and Data Tables
I’m stuck with the error shown below, I even downloaded the solution step by step but it won’t work for me, can someone help me, please?

Thank you,

[ppr (Peter Preuss)]

ensure that the datatable is initialized

e.g. set on the variable panel a default value like
new DataTable()

[Jedi_Training (DJ)]

Hi Peter,
Thank you for getting back to me.
I set it up but it doesn’t work for me still. (I’m not sure if I set it up correctly)

[ppr (Peter Preuss)]

this datatable also needs to be initialized in the same way

[Jedi_Training (DJ)]

Thank you so much, Peter. It works!!