I can't send data in text field (help)

Hello,
I have a small problem when sending data to textfield
I try typing {var: read_data9} and {var: read_data9.name_p} but it does not work
if anyone can help me I appreciate it a lot
I attach images of what I have

Do you have a variable named apellido_p? Fields are referenced using {data:fieldname}

Hello,

I do not believe this is the full path to the data in the variable, if your read data is set to select "First matching record" then the path should be in this format: {var:read_data9.Model.field_name}

Which means that you are missing the Model name.

Best regards,
Max