# Unable to start application on this device: an unknown server-side (Windows) **URL:** \ **Category:** Mobile Testing\ **Tags:** mobile-testing, katalon-studio\ **Created:** [December 21, 2017, 8:37am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650 "2017-12-21T08:37:30Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Muhammad\_Fahmi](https://avatars.discourse-cdn.com/v4/letter/m/8e8cbc/32.png) [@Muhammad\_Fahmi](https://forum.katalon.com/u/Muhammad_Fahmi)\ **Post date:** [December 21, 2017, 8:37am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/1 "2017-12-21T08:37:30Z")
I got this error after I set to debug, and follow the step by step from katalon web. unable to start application on this device: an unknown server-side error occurred while processing the command. Original error packageAndLaunchActivityFromManyfest failed. Original error: Could not find aapt.exe.in … please help me because I really need learn about katalon, thanks ---
**Author:** ![Zarashima](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/zarashima/32/928_2.png) [@Zarashima](https://forum.katalon.com/u/Zarashima)\ **Post date:** [December 21, 2017, 8:44am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/2 "2017-12-21T08:44:13Z")
Please provide more details following with template from this post: [http://forum.katalon.com/discussion/4405/read-this-first-before-reporting-an-issue-bug#latest](http://forum.katalon.com/discussion/4405/read-this-first-before-reporting-an-issue-bug#latest) 🙂 You don’t need to provide all information, just provide necessary information. ---
**Author:** ![Muhammad\_Fahmi](https://avatars.discourse-cdn.com/v4/letter/m/8e8cbc/32.png) [@Muhammad\_Fahmi](https://forum.katalon.com/u/Muhammad_Fahmi)\ **Post date:** [December 21, 2017, 10:38am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/3 "2017-12-21T10:38:43Z")
@Vinh Nguyen this is my requirement : ## \*\*OS \*\*(Windows 10) ## **Katalon Studio Version** (5.2.0.1) **## Environment (for Mobile testing)** \* Appium version ( 1.7.1 ): \* Mobile platform/version under test( Android 7): \* Real device or emulator/simulator ( Asus Zen-phone (simulator)? ): **## Expected Behavior -** Go to test case **## Actual Behavior -** Error, can’t continue to the next step **## Screenshots / Videos (sorry I don’t know how to upload image here)** [https://drive.google.com/open?id=1ecGjtdd0RL2w9lEIg5ZNLWvaHozySQIT](https://drive.google.com/open?id=1ecGjtdd0RL2w9lEIg5ZNLWvaHozySQIT) [https://drive.google.com/open?id=1w20xjsi4LOxDMk57dXwMYaGbDcCf3OR0](https://drive.google.com/open?id=1w20xjsi4LOxDMk57dXwMYaGbDcCf3OR0) ---
**Author:** ![Zarashima](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/zarashima/32/928_2.png) [@Zarashima](https://forum.katalon.com/u/Zarashima)\ **Post date:** [December 21, 2017, 1:28pm UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/4 "2017-12-21T13:28:44Z")
Hi Muhammad, Based on your attached screenshot, I suggest you go to these locations to see if there is a file called aapt.exe there [[Album] Imgur ![](https://i.imgur.com/dNdeLw9.jpg?fb "Imgur") ](https://imgur.com/a/ET8DW) ---
**Author:** ![Muhammad\_Fahmi](https://avatars.discourse-cdn.com/v4/letter/m/8e8cbc/32.png) [@Muhammad\_Fahmi](https://forum.katalon.com/u/Muhammad_Fahmi)\ **Post date:** [December 22, 2017, 6:05am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/5 "2017-12-22T06:05:04Z")
Sir @“Vinh Nguyen” I couldn’t find file (aapt.exe) on platform-tools. also I don’t have emulator,tools, folder on my sdk. and the last on folder 27.0.2 it’s empty folder [[Album] Imgur ![](https://i.imgur.com/mkaNLpR.jpg?fb "Imgur") ](https://imgur.com/a/NCcVb) ---
**Author:** ![Muhammad\_Fahmi](https://avatars.discourse-cdn.com/v4/letter/m/8e8cbc/32.png) [@Muhammad\_Fahmi](https://forum.katalon.com/u/Muhammad_Fahmi)\ **Post date:** [December 22, 2017, 6:08am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/6 "2017-12-22T06:08:25Z")
here is I can find my aapt but on .py [https://imgur.com/xYMqYO6](https://imgur.com/xYMqYO6) ---
**Author:** ![Zarashima](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/zarashima/32/928_2.png) [@Zarashima](https://forum.katalon.com/u/Zarashima)\ **Post date:** [December 22, 2017, 9:18am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/7 "2017-12-22T09:18:23Z")
I can see all of that is .py (?). Looks like that there is a misconfiguration from your machine, so in this case you should double check again other .exe files to see if it behaves the same. ---
**Author:** ![Muhammad\_Fahmi](https://avatars.discourse-cdn.com/v4/letter/m/8e8cbc/32.png) [@Muhammad\_Fahmi](https://forum.katalon.com/u/Muhammad_Fahmi)\ **Post date:** [December 22, 2017, 12:15pm UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/8 "2017-12-22T12:15:37Z")
@“Vinh Nguyen” no item match sir when I searched aapt.exe on file (.katalon) ---
**Author:** ![Muhammad\_Fahmi](https://avatars.discourse-cdn.com/v4/letter/m/8e8cbc/32.png) [@Muhammad\_Fahmi](https://forum.katalon.com/u/Muhammad_Fahmi)\ **Post date:** [December 23, 2017, 8:24am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/9 "2017-12-23T08:24:59Z")
@“Vinh Nguyen” so what should I do sir?? because I still couldn’t find aapt.exe on folder .katalon ---
**Author:** ![Zarashima](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/zarashima/32/928_2.png) [@Zarashima](https://forum.katalon.com/u/Zarashima)\ **Post date:** [December 24, 2017, 2:33am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/10 "2017-12-24T02:33:32Z")
I’m not sure about this statement “when I searched aapt.exe on file (.katalon)” , how do you search it? Based from your screenshot, your aapt.exe file there, but currently it’s treated by .py. So in this way please adjust your system to not treat .exe file like that > **[How to set default programs in Windows 10](https://www.cnet.com/how-to/how-to-set-default-programs-in-windows-10/)** > > Need to get your BMP files to automatically open in MS Paint? Here's how. ---
**Author:** ![Shruti\_Saxena](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@Shruti\_Saxena](https://forum.katalon.com/u/Shruti_Saxena)\ **Post date:** [February 16, 2018, 6:22am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/11 "2018-02-16T06:22:40Z")
Hi Alex, Even I am getting appt.py how to make it use as .exe kindly help thanks Shruti ---
**Author:** ![Shruti\_Saxena](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@Shruti\_Saxena](https://forum.katalon.com/u/Shruti_Saxena)\ **Post date:** [February 16, 2018, 6:24am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/12 "2018-02-16T06:24:27Z")
> Shruti Saxena said: > > Hi Alex, > Even I am getting appt.py how to make it use as .exe > kindly help > > thanks > Shruti ![](https://s3.amazonaws.com/katalon-forum/editor/yg/5ao2ghrptejy.jpg "Image: https://s3.amazonaws.com/katalon-forum/editor/yg/5ao2ghrptejy.jpg") [error.JPG](https://s3.amazonaws.com/katalon-forum/editor/yg/5ao2ghrptejy.jpg) ---
**Author:** ![Nguy\_n\_Minh\_Tu\_n](https://avatars.discourse-cdn.com/v4/letter/n/a587f6/32.png) [@Nguy\_n\_Minh\_Tu\_n](https://forum.katalon.com/u/Nguy_n_Minh_Tu_n)\ **Post date:** [March 14, 2018, 11:26am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/13 "2018-03-14T11:26:20Z")
![](https://s3.amazonaws.com/katalon-forum/editor/wk/8a0l9t2duwqd.png) @Vinh Nguyen Can you help me understand the problem I am facing? ---
**Author:** ![Nattawut\_Pinnoek](https://avatars.discourse-cdn.com/v4/letter/n/35a633/32.png) [@Nattawut\_Pinnoek](https://forum.katalon.com/u/Nattawut_Pinnoek)\ **Post date:** [March 28, 2018, 4:38am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/14 "2018-03-28T04:38:20Z")
I am facing the same error. ![](https://s3.amazonaws.com/katalon-forum/editor/gp/38dsuak4bc01.png "Image: https://s3.amazonaws.com/katalon-forum/editor/gp/38dsuak4bc01.png") [Screen Shot 2561-03-28 at 11.35.15.png](https://s3.amazonaws.com/katalon-forum/editor/gp/38dsuak4bc01.png) ---
**Author:** ![Phil](https://avatars.discourse-cdn.com/v4/letter/p/e95f7d/32.png) [@Phil](https://forum.katalon.com/u/Phil)\ **Post date:** [April 5, 2018, 1:43pm UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/15 "2018-04-05T13:43:27Z")
I am the same with emulator Android Studio with CPU/ABI ARM64 ![](https://s3.amazonaws.com/katalon-forum/editor/pq/xw43a3krwlef.png "Image: https://s3.amazonaws.com/katalon-forum/editor/pq/xw43a3krwlef.png") [image.png](https://s3.amazonaws.com/katalon-forum/editor/pq/xw43a3krwlef.png) ---
**Author:** ![Manoj\_N\_N](https://avatars.discourse-cdn.com/v4/letter/m/e99b99/32.png) [@Manoj\_N\_N](https://forum.katalon.com/u/Manoj_N_N)\ **Post date:** [May 23, 2018, 7:18am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/16 "2018-05-23T07:18:58Z")
Even I am facing the same issue…To fix it what you want me to do…Please send me the steps ---
**Author:** ![jaiveer1](https://avatars.discourse-cdn.com/v4/letter/j/e99b99/32.png) [@jaiveer1](https://forum.katalon.com/u/jaiveer1)\ **Post date:** [May 23, 2018, 8:56am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/17 "2018-05-23T08:56:01Z")
Many people facing the same issue but still there is noone come out with a proper explanation or step to short this problem. Please somebody share your knowledge and let us know how we solve this problem . I am also facing the same issue in iOS ---
**Author:** ![Enric\_Beltran\_Cano](https://avatars.discourse-cdn.com/v4/letter/e/3e96dc/32.png) [@Enric\_Beltran\_Cano](https://forum.katalon.com/u/Enric_Beltran_Cano)\ **Post date:** [May 30, 2018, 10:05am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/18 "2018-05-30T10:05:39Z")
I have the same problem, any solutions yet? ---
**Author:** ![jaiveer1](https://avatars.discourse-cdn.com/v4/letter/j/e99b99/32.png) [@jaiveer1](https://forum.katalon.com/u/jaiveer1)\ **Post date:** [June 5, 2018, 5:55am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/19 "2018-06-05T05:55:55Z")
Guys I have found the solution and i think katalon team should hire me because nobody from their side come in front with a proper solution. Solution : In iOS first you uninstall the application from your device . Open your Xcode go to window then Device & Simulator and then add your application again Now try ,it will work. ---
**Author:** ![alice\_chou](https://avatars.discourse-cdn.com/v4/letter/a/ac8455/32.png) [@alice\_chou](https://forum.katalon.com/u/alice_chou)\ **Post date:** [June 28, 2018, 7:18am UTC](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650/20 "2018-06-28T07:18:30Z")
![](https://s3.amazonaws.com/katalon-forum/editor/dk/syrlaqqj423j.png "Image: https://s3.amazonaws.com/katalon-forum/editor/dk/syrlaqqj423j.png")You can try it [i7ysz1gex2vi.png](https://s3.amazonaws.com/katalon-forum/editor/dk/syrlaqqj423j.png) [Next page](https://forum.katalon.com/t/unable-to-start-application-on-this-device-an-unknown-server-side-windows/8650.md?page=2)