Strange IB connection issue

[bobD 6]

I have a licensed IB server on my home network, accessed both hardwired (desktop machines) and over the network wifi

On my laptop the connection is rock solid

On my wife's laptop my Delphi program will connect when the computer is first booted up, but then consistently fails after a couple of minutes

Same Delphi program, same build, same connection parameters. And as stated, it works on startup--just not later.

This only started about a week or so ago, and since everything else is pretty much identical, I'm suspecting the latest Windows update: my laptop is Win11 and hers is Win10.

Since my laptop always connects, I'm tending to rule out the server or connection settings...what else could it be?

I did set up a new rule in the Windows firewall to allow outbound connection from my Delphi program, but that had no effect.

I even tried turning the firewall off: again, no effect. I'm perplexed.

Anyone seen anything like this--connecting on a fresh boot, but then consistently failing?

bobD

 

[tgbs 16]

And the error code is?

 

[bobD 6]

I'll have to add some debugging code to the program to surface that. It's a straight db access program, so if it can't connect it simply tells the user that it can't find the database. It's my password manager, so not designed to be real helpful to an unauthorized user.

I'm still loooking at something external as the most likely issue, though. Both laptops are running the same build of my code ("UTC build date: Sat, 27 May 2023,  8:26 PM") and this is a very recent issue.

Interestingly enough, if I try to log in to the network server using the Emb. IBConsole program on her machine, I get a failure dialog message of:
    Unable to complete network request to host "<NAME>".
    Failed to locate host machine.
    The specified name was not found in the hosts file or Domain Name Services.

while doing so from my laptop works fine.

I have no idea why it suddenly can't find a database server it's been using for several years. 

bobD

Edited 6 hours ago by bobD

[Serge_G 91]

Check port 3050 access

[tgbs 16]

This is probably name resolution problem. Check WINS, DNS etc. Do you have DHCP on server? Try connect app via IP.