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In Launcher -> Config click the Restore button beside Commander.

If that does not fix the problem, download
<>
and place that file in your Commander directory (replacing the
existing file of the same name).

73,

... Joe, W4TV

On 2025-01-24 2:10 PM, Jim Cary via groups.io wrote:

Unable to open Com4

Invalid Port Number (8002), thePort = primary CAT port, port number =

4, settings = 38400, N, 8,1

That is a Windows error message that says either COM4 does not exist
(install the driver, if you are using a USB to serial adapter or the
Elecraft KIO3B - I/O board with built-in USB to serial adapter) or
another program is already using that port (COM4). Close all other
programs.

TCP/IP port 52002 is already in use; choose another port

TCP/IP port 52002 is already in use; choose another port and restart the Network Server

RESTART Windows. If that does not resolve the issue follow the
instructions on the second line of the error message: (Commander ->
Config -> General ... click the Net Serv button -> change "Base Port"
in TCP Network Service to something like 53000 and click "Restart").

73,

... Joe, W4TV


On 2025-01-24 2:10 PM, Jim Cary via groups.io wrote:

HI Joe,
I think I have created a monster!
Anyway, I downloaded the txt file but when I start Commander I get two messages before I even have a chance to enter any information.
Unable to open Com4
Invalid Port Number (8002), thePort = primary CAT port, port number =
4, settings = 38400, N, 8,1
CI-V Commander
TCP/IP port 52002 is already in use; choose another port
TCP/IP port 52002 is already in use; choose another port and restart the Network Server

On 2025-01-25 1:18 PM, Jim Cary via groups.io wrote:

But, when I use the K3 utility at the remote site to check the status, it shows that no ports are open, which is certainly
consistent with what Commander is showing.

I have no concept of your control system nor can I identify
"remote" site and "control" site. Further, I don't know
if you have a K3 with RS-232 interface, an "upgraded" K3 with
KIO3B (USB) interface, or a K3s since you have not made that
clear.

However, if the K3 Utility sows that no ports are available,
it can be one of several things: 1) with RS-232 the cables
are disconnected, 2) the serial port driver (USB or RS-232)
is not installed of functioning, 3) the K3/K3S KIO3/KIO3B
board has suffered a failure, 4) you are trying to access the
radio via the RRC system and its serial drivers are bad of
not installed, 5) your RRC network connection has failed (or
is being blocked by a firewall).

Since you're running a remote system, you're on your own!
Strip it down to the base "one radio, one computer at the
same location" and start from there.

73,

... Joe, W4TV


On 2025-01-25 1:18 PM, Jim Cary via groups.io wrote:

Joe, I tried that and it didn't help. ?Let me add some background. ?I have been running this exact set-up for several years on a remote basis. ?Using the RRC system with my K3 at the remote site and the K3 mini at the control site. ?I've never had a problem and have not changed any settings. ?I can control the KPA-500 and KAT- 500 fine, even right now. ?The band change functions work and I can even key the transmitter from the control site. ?But, when I use the K3 utility at the remote site to check the status, it shows that no ports are open, which is certainly consistent with what Commander is showing. ?So obviously something has happened to the link between the PC and radio. ?Any thoughts? ?And as I said, I haven't changed any cables in a long time (that would be too easy of a solution!).
Jim

I get a message "Commander will Terminate" and it does.

What is the error message before "Commander will Terminate"?

Is the K3 Utility running when you get "Commander will Terminate"?
If so, stop it - only one application can communicate with the K3
at a time.

Is there an "errorlog.txt" file in in the Commander directory?
If so, send it direct to AA6YQ as documented in:
<>

73,

... Joe, W4TV

On 2025-01-25 3:08 PM, Jim Cary via groups.io wrote:

Joe, The configuration is a K3 with the RS232 connection to the PC.
Following your suggestion, I stripped the station down to just the K3 and PC. ?The only connections are the K3 to the RS232, the computer to the internet, and an antenna connected.
When I try to load the Commander App, I get a message "Commander will Terminate" and it does. ?Sometimes I get a brief glimpse of the Commander configuration screen... for about 1 second.
And by the way the K3 utility does show the K3 connecting to the computer.
Jim

+ AA6YQ comments below

That fixed the problem and Commander starts up fine. However, the frequency indicator shows all 0's, which means that while the K3 on Port 5 is apparently communicating with Commander, the frequency is not being passed.

+ Is "Port 5" the COM port to which your K3 is connected?

+ If so, is Commander configured to communicate with your K3 via COM5?

+ What leads to conclude that " Port 5 is apparently communicating with Commander"?

- does Commander track your K3's frequency?

- can Commander set your K3's frequency?

- does Commander track your K3's mode?

- can Commander set your K3's mode?

- can Commander switch your K3 between RX an TX?

73,

Dave, AA6YQ