@Moderator, please help me delete this (intermediate) post.

You can achieve this by filling the combobox using the 'FillComboBox' script based on the value of the attribute. 

However, it will only update the value of the attribute when you unselect/reselect it after filling the filter value. 

@Moderator, please help me delete this (intermediate) post.

I understand exactly what you want, but this is the closest I could get. You can also use the 'FilterRow' function, to filter records based on a standard table, but that has the same limitation. 

Hopefully, someone else can find a better solution for you. 

Wouter den Haan

I understand exactly what you want, but this is the closest I could get. You can also use the 'FilterRow' function, to filter records based on a standard table, but that has the same limitation. 

Hopefully, someone else can find a better solution for you. 

 Any help is a great gesture. Thanks Wouter den Haan.