Run a page dynamically via HYPERLINK

Hi,

I want to run a page dynamically from within the RTC.

The following line works fine:

HYPERLINK('dynamicsnav://localhost:7046/DynamicsNAV/' + COMPANYNAME + '/runpage?page=21');

but the next line gives me an error (but works fine if called from classic client):

HYPERLINK('dynamicsnav://///runpage?page=21');

My Problem is now: How can I retrieve the servername, port and instance name?

Regards,
Steffen