The following mod script files are not identical

[Octal40]

I'm getting this Notice error when connecting to my own server on the same machine:

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Notice
Cannot join. The following mod script files are not identical between you and the server:

mod-PickerPipeTools

To repro:
1. Do a clean install of Factorio 17.53
2. Connect to my server
3. Let it update my mods (Steam OR zip install (zip install is to another, separate folder from the server's))
4. Game reboots and connects but fails because server settings(?) need updating. I click "Yes*" and let it do that.
5. Game updates settings, relaunches and I can play. Yay!
6. Quit out of the server but leave the game running.
7. Try and rejoin my server via IP
8. Get the Notice message above.

Now, the fix is to go to the server's mod folder and copy and paste it over the one I have. But I have to do this... 50% of the time? It's very annoying. It's always this same mod, too. Also, if my client's version is different, shouldn't it try and resync the mod?

[Octal40]

So I changed things around so that the server is launched from my Steam install. Steam client has the

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--no-log-rotation

arg applied. Now I get:

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Notice
Cannot join. The following mod script files are not identical between you and the server:

level

[Octal40]

Updated to 17.x (so whatever is latest on Steam). Server and client are running the same exe/data now. I could connect after updating... once. Now I can't connect again and it's back to PickerPipeTools with the error. IT'S LITERALLY THE SAME FILE. :/

[Nexela]

This is a mod issue, By the looks of it with one of my mods. Soooooooooo I think I know why just need to time to figure out how to handle it.

[mmmPI]

I am not sure it helps, but it may have to do with a particular settings on the mod. I think I had the same error happening when I tried to duplicate some save files, and sync the mods from one of the duplicate, it would somehow download the correct version of the mod but at the time i thought it was not copying correctly the particular settings i had tweaked for the mod. I solved my problem by launching the save without the mod, saving it and reloading it with the freshly downloaded mod. I could do that because the mod in question was not adding entities or migrate content like Picker tool.

[Octal40]

This is a mod issue, By the looks of it with one of my mods. Soooooooooo I think I know why just need to time to figure out how to handle it.

While there may be an issue with your mod, even with the mod uninstalled, I still ran into the problem and the notice said the mod "level" was at fault. So, whatever the issue is, it's likely found in multiple mods.

[Octal40]

I am not sure it helps, but it may have to do with a particular settings on the mod. I think I had the same error happening when I tried to duplicate some save files, and sync the mods from one of the duplicate, it would somehow download the correct version of the mod but at the time i thought it was not copying correctly the particular settings i had tweaked for the mod. I solved my problem by launching the save without the mod, saving it and reloading it with the freshly downloaded mod. I could do that because the mod in question was not adding entities or migrate content like Picker tool.

I thought it might be something like that, but running the server and client out of the same install has the same issue and those files are literally the same between client/server. My guess is that the Notice message isn't fully accurate (there's an issue, but not that the files are actually different).

[Octal40]

BTW, this is solved IF:

1. I launch the client first
2. Then I launch the server
3. Then I connect the client to the server. I haven't tried connecting a 2nd client yet.

[Rseding91]

The error message is 100% accurate. The most common problem with this is broken mods conditionally requiring stuff based off mod settings. I think I can detect at least partially when it happens to improve the error message.