adb server version (40) doesn't match this client (41); killing

Question

Couldn't start project on Android:

adb server version (40) doesn't match this client (41); killing...
could not read OK from ADB Server
* failed to start daemon
adb.exe: failed to check server version: cannot connect to daemon

i have installed android platform development tools but it still doesn't work even after changing Genymotion settings to use my android Software development kit instead of its default android tools

Maybe my related Q/A helps somebody who didn't find an answer here: https://android.stackexchange.com/a/232860/340401 — Cadoiz, Jan 14 '21 at 11:21

score 9 · Accepted Answer · edited Jan 14 '21 at 11:32

9

In my case the problem occurred because of two ADB paths. I actually moved my Android SDK (due to lack of space in system drive) from one path to another and set up the environment variables accordingly. Starting and killing the server didn't help so I followed this thread in GitHub

But unlike that thread, instead of replacing the files in scrcpy folder, I replaced the files in C:\Program Files\Genymobile\Genymotion\tools $copied the files from sdk\platform-tools$

$replaced the files in the Genymobile\Genymotion\tools$

And it started working after that

edited Jan 14 '21 at 11:32

Community

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answered Sep 05 '19 at 01:11

Yash Vardhan

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You saved me 2 hours of Googling dude, works like a charm. – Martins Jul 29 '20 at 12:33
Thanks a lot dude...You saved lot of my time – Jalakam Kiran Dec 29 '20 at 15:16

score 0 · Answer 2 · edited Jan 14 '21 at 12:22

0

kill the adb server with the flowing command

package: com.technobd.topbdnews 

adb uninstall com.technobd.topbdnews // run this command replacing the package name

edited Jan 14 '21 at 12:22

i_want_more_edits

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answered Jul 09 '19 at 08:54

Jane Alam

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which package name specifically – brian omondi Jul 09 '19 at 08:59
Your app package name – Jane Alam Jul 09 '19 at 09:00
now i get this error could not read ok from ADB Server * failed to start daemon error: cannot connect to daemon - waiting for device - error: cannot connect to daemon – brian omondi Jul 09 '19 at 09:17
plus when i do expo start i get the same error as before – brian omondi Jul 09 '19 at 09:24
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You can try kill server and restart the server again **adb kill-server** **adb start-server** OR **1. adb kill-server** **2. sudo cp ~/Android/Sdk/platform-tools/adb /usr/bin/adb** **3. sudo chmod +x /usr/bin/adb** **4. adb start-server ** Try to execute the above 4 commands one by one. – Jane Alam Jul 09 '19 at 10:00
i am on a windows pc so sudo cp command are not recognizable – brian omondi Jul 09 '19 at 11:19
Ignore ***sudo* for windows. From your Android studio command line run the above command. – Jane Alam Jul 09 '19 at 11:48

adb server version (40) doesn't match this client (41); killing

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