UDF link type and formatted search

Question

Dear experts,
Im trying to use a formatted search to fill a UDF of the link type.
The plan is to generate a weburl voor googlemaps like the link with business partner addresses. I do this with the following query:
     DECLARE @URLp1 AS VARCHAR(254)
     DECLARE @Adres AS VARCHAR(254)
     DECLARE @Plaats AS VARCHAR(254)
     DECLARE @Postcode AS VARCHAR(254)
     DECLARE @URL AS VARCHAR(254)
     SET @URLp1=('http://maps.google.com/?q=')
     SELECT @Adres=($[$U_Adres.1.0])
     SELECT @Plaats=($[$U_Plaats.1.0])
     IF LEN($[$U_Postcode.1.0])=0
          BEGIN
               SELECT @URL=(@URLp1+@Adres+'+'+@Plaats)
               SELECT @URL
          END
     SELECT @Postcode=($[$U_Postcode.1.0])
     SELECT @URL=(@URLp1+@Adres+'+'+@Postcode+'+'+@Plaats)
     SELECT @URL=(SELECT REPLACE (@URL,' ','%20'))
     SELECT @URL
The select replace doesn't work yet but that's not the real problem.
I used the following formatted search settings:
Search in Existing User-Defined Values according to Saved Query
Auto Refresh When Field Changes -> set to Adres
Refresh Regularly
When I try these settings on my UDF link style the field just stays empty.
When I use this formatted search on a Alphanumeric(100) field it more or less works. I need to manualy refresh the field to execute the query.
If I simplify the query to insert just one value like 'Opportunity No.' ($[$74.1.0]) it does auto update in both fields.
Could someone point me in the right direction what I'm missing/forgetting or give me a sollution that might even be better?
Kind regards
Edit:
PS. We are using SAP BO 8.8 PL15

Answer 1

I've found a topic with a similar problem but there's no solution there either...
Formatted search with Query auto update