Setting filters on Primary Key

Hi,

Before displaying the records from a table, I want to filter the records based on its primary key "No.".

For this, the required filter was set at the OnInit trigger of the form.

But when we run the form, it displays all the records. Setting filters for the fields other than the primary key works fine.

Am I missing something? Why is the filter set on the primary key not considered when the form is opened?

Regards,
Anse