I have been using PowerBuilder R3 Build 2703 (19.2.0.2703) and deploying an application to PowerServer (PB Edition) 2020 Build 2703.00 (64 bit). I have tested my 64 bit Oracle and 32 bit Oracle connections from the PB front ends, and the PowerServer resources/data source, all make connections to the Oracle 19 database I have recently down loaded PB 2021 Build 1288, runtime 21.0.0.1288 and have been trying to configure the same Oracle connection in the PowerServer Project object. I downloaded the Oracle .Net driver, installed the Oracle driver and re-booted. I am getting the following error: OracleInternal.Network.AddressResolution when trying to test the connection in the (from the Web API tab) database Configuration area. How does one debug what the error is? I have tried some of the .Net sugguestions from a Google search.