How do I update an active portal row number "Get(activeportalrownumber)" when I delete a row in any portal?. 

When I delete any portal rows that are in the middle of the portal, I cannot get the portal row number to update,change or refresh..

I'm using a script to delete the portal row when I click on a button but unable to change the portal row number.

What function should I be using to correct the portal row number?

in the related table add an unstored calculation field:  Get(RecordNumber) and put that on the portal you will see it will give you a sequential number. 

Thanks

I couldn't understand your question. If you only want your portal to display a sequential row number for each record shown, you can simply enter Layout mode and insert the Record Number Symbol into the 1st row. 

There is no need to add a calculation field for this, and it has nothing to do with the Get(ActivePortalRowNumber) function.