Generate Record Type from Process Model


I would like to generate a Grid Table from a Process Model. My process has an array of CDT called "Result" in this format: 

[nfc=, description= proto1, type=1, items=, to=, id=1],

[nfc=, description= proto2, type=1, items=, to=, id=2],

[nfc=, description= proto3, type=1, items=, to=, id=3]

Into "Edit Record List" I have defined a column with this property:  Component text --> Display value -> fr!result.description

But the preview prints me out:  "

Error Evaluating UI Expression

The field [result.description] does not exist.

I can't understand how to show all fields of an array from a Process Model.

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