'Can't Start the web server' Error Message When Starting Duplicacy

Support
#1

Hi all,

I’m getting the following error message when starting Duplicacy. Can anyone help with this?

I am running on a freshly installed Windows 10 1903 Hyper-V VM

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501002×528 163 KB

To add I did have Duplicacy running in a test environment which is no longer being used.

How to fix the "Can’t Start the web server" error?
#2

Either Duplicacy is already running, or you have another program that listening on the same 3875 port.

Do you see the other Duplicacy instance in Task Manager?

#3

Thank you so much, it seems duplicacy was starting itself.

#4

Here too, duplicacy was starting itself.
So what does the “Duplicacy Web Edition” icon do? Nothing except giving an error message?
I need to start the web browser manually and enter the address 127.0.0.1:3875 manually if I want to open Duplicacy web?

#5

I’m seeing the same error on Windows 10 with Duplicacy Web Edition installed for a user, not as a service:

  1. Launch Duplicacy Web Edition from the Start Menu shortcut. This runs duplicacy_web_win_x64_1.4.1.exe and opens the web page.

  2. Close the web page. This does not terminate the duplicacy_web_win_x64_1.4.1.exe task.

  3. Launching Duplicacy Web Edition from the Start Menu shortcut again fails ‘Can’t start the web server’ because it is already running, so you need to have a bookmark/link to the web page saved and use that – confusing.

#6

Check who is already listening on that port. And act accordingly — either nuke them or change port Duplicacy is trying to use.

#7

This is a good feature request.

DuplicacyWeb shall check on start if there is already instance running (distinguishing one installed as a service from the user app on windows) and tell the other instance to launch the browser. @gchen?