Thanks alot Josh for your description and the work around I've still got to test. I am having the exact same problems using .net 6.0. I've searching for solutions for hous now and there is no chance to successfully debug this matter nor find any other solutions on the Github Examples.  

regard peter

below simple code sample.

c# Code

public static class PBCSTest

{
    public int Tester()
        {

            string errstr = "";

            int err;

            err = RegisteredObject.TriggerEvent("w_sheet", "ue_callback", "Testmessage", ref errstr);

            return err;
        }
}

PB Code:

// Open scirpt of w_sheet
int li_reg = 0
int li_err = 0
boolean lb_created = false

ino_service = create nvo_pbcstest

lb_created = ino_service.of_createondemand( )
// returns true

li_reg = ino_service.RegisterObject("w_sheet",this)
// returns 1

li_err = ino_service.of_tester();
// returns -52

li_reg = ino_service.RegisterObject("w_sheet",this)
// returns -51

li_reg = ino_service.UnregisterObject("w_sheet")
// Returns 1

li_reg = ino_service.RegisterObject("w_sheet",this)
// returns 1

li_reg = ino_service.UnregisterObject("w_sheet")
// Returns 1

destroy ino_service

ue_callback

Hi Josh, Have you upgraded to PowerBuilder 2022 R3?  The base PowerBuilder 2022 doesn't support .NET 6.  We added .NET 6 support starting from revision 2: https://docs.appeon.com/pb/whats_new/dotNET_6_upgrade.html

I now have a example demonstrating the problem.  The .net RegisteredObject.Triggerevent allways returns a -52 according to docs meaning "-52 -- The objectname is not registered."

To Check unzip attached to your development folder. Start either exe or in PB. .net class is refrenced via relative path, so it should work out of the box.

It would be nice if someone here comes up with a solution or has equal problems before i submit it as a bug.