Pumps found upstream/downstream of this pump

The error message:

Open

This error allows you to keep calculating but is a hydraulic error.

Meaning:

There are 2 pumps which are placed in ‘series’. If the error shows upstream, you will find a pump closer to the energy centre. If the notification says downstream, you can find the pump closer to the end units.

How to solve this error:

It may be that this installation is correct, hence, an accurate check to verify should be done. Otherwise, remove one of the pumps to fix this error.