I have been running two instances of CumulusMX on my Windows10 PC (one with WiFiLogger, and the other with WLL) by starting the second instance from the DOS cmd \CumulusMXwll\CumulusMX.exe -port=8999
This morning after another "Your computer ran into a problem and needs to restart" message and computer auto shutdown and restart I can no longer connect the second instance. I can start each instance separately by the full path without a -port=xxxx parameter but it fails if I use that -port=xxxx. I can also start each instance separately by right-click on the CumulusMX.exe in the installed folder but this does not allow to run in an alternate port.
Any ideas while all of a sudden the -port=8999 parameter no longer works, and is there another way to start a second CumulusMX in an alternate port?
Enjoy,
Paul
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Latest Cumulus MX V4 release 4.4.2 (build 4085) - 12 March 2025
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
If you are posting a new Topic about an error or if you need help PLEASE read this first viewtopic.php?p=164080#p164080
Starting second instance of CumulusMX from DOS CMD
Moderator: mcrossley
- PaulMy
- Posts: 4355
- Joined: Sun 28 Sep 2008 11:54 pm
- Weather Station: Davis VP2 Plus 24-Hour FARS
- Operating System: Windows8 and Windows10
- Location: Komoka, ON Canada
- Contact:
Starting second instance of CumulusMX from DOS CMD
VP2+
C1 www.komokaweather.com/komokaweather-ca
MX https://komokaweather.com/cumulusmx/index.htm /index.html /index.php
MX https://komokaweather.com/cumulusmxwll/index.htm /index.html /index.php
MX https:// komokaweather.com/cumulusmx4/index.htm

C1 www.komokaweather.com/komokaweather-ca
MX https://komokaweather.com/cumulusmx/index.htm /index.html /index.php
MX https://komokaweather.com/cumulusmxwll/index.htm /index.html /index.php
MX https:// komokaweather.com/cumulusmx4/index.htm
-
Mapantz
- Posts: 1992
- Joined: Sat 17 Dec 2011 11:55 am
- Weather Station: Davis Vantage Pro2
- Operating System: Windows 11 x64
- Location: Dorset - UK
- Contact:
Re: Starting second instance of CumulusMX from DOS CMD
I start my second instance by adding a target command via right clicking the Cumulus MX icon.
I have a shortcut to the icon on my desktop - right click and scroll down to properties click it..
Target: C:\CumulusMX\CumulusMX.exe -port 8998
I have a shortcut to the icon on my desktop - right click and scroll down to properties click it..
Target: C:\CumulusMX\CumulusMX.exe -port 8998
- PaulMy
- Posts: 4355
- Joined: Sun 28 Sep 2008 11:54 pm
- Weather Station: Davis VP2 Plus 24-Hour FARS
- Operating System: Windows8 and Windows10
- Location: Komoka, ON Canada
- Contact:
Re: Starting second instance of CumulusMX from DOS CMD
Thank you, that works great. Got two CMX shortcuts and both running at the same time again.
Enjoy,
Paul
Enjoy,
Paul
VP2+
C1 www.komokaweather.com/komokaweather-ca
MX https://komokaweather.com/cumulusmx/index.htm /index.html /index.php
MX https://komokaweather.com/cumulusmxwll/index.htm /index.html /index.php
MX https:// komokaweather.com/cumulusmx4/index.htm

C1 www.komokaweather.com/komokaweather-ca
MX https://komokaweather.com/cumulusmx/index.htm /index.html /index.php
MX https://komokaweather.com/cumulusmxwll/index.htm /index.html /index.php
MX https:// komokaweather.com/cumulusmx4/index.htm
- mcrossley
- Posts: 14388
- Joined: Thu 07 Jan 2010 9:44 pm
- Weather Station: Davis VP2/WLL
- Operating System: Bullseye Lite rPi
- Location: Wilmslow, Cheshire, UK
- Contact:
Re: Starting second instance of CumulusMX from DOS CMD
Hi Paul, I think you were using...
-port=8999
The correct format is...
-port 8999
-port=8999
The correct format is...
-port 8999
- PaulMy
- Posts: 4355
- Joined: Sun 28 Sep 2008 11:54 pm
- Weather Station: Davis VP2 Plus 24-Hour FARS
- Operating System: Windows8 and Windows10
- Location: Komoka, ON Canada
- Contact:
Re: Starting second instance of CumulusMX from DOS CMD
Thanks Mark,
It all works fine now from DOS cmd using -port 8999 as well as with Mapantz shortcut suggestion. After the PC crash I thought I had tried -port 8999 but likely missed that in my panic following the PC crash so came up with -port=8999. I've got a great memory, as long as it is written on that piece of paper in front of me
Enjoy,
Paul
It all works fine now from DOS cmd using -port 8999 as well as with Mapantz shortcut suggestion. After the PC crash I thought I had tried -port 8999 but likely missed that in my panic following the PC crash so came up with -port=8999. I've got a great memory, as long as it is written on that piece of paper in front of me
Enjoy,
Paul
VP2+
C1 www.komokaweather.com/komokaweather-ca
MX https://komokaweather.com/cumulusmx/index.htm /index.html /index.php
MX https://komokaweather.com/cumulusmxwll/index.htm /index.html /index.php
MX https:// komokaweather.com/cumulusmx4/index.htm

C1 www.komokaweather.com/komokaweather-ca
MX https://komokaweather.com/cumulusmx/index.htm /index.html /index.php
MX https://komokaweather.com/cumulusmxwll/index.htm /index.html /index.php
MX https:// komokaweather.com/cumulusmx4/index.htm