# Can't start iOS app with katalon **URL:** \ **Category:** Mobile Testing\ **Tags:** mobile-testing, katalon-studio\ **Created:** [March 4, 2019, 12:50pm UTC](https://forum.katalon.com/t/cant-start-ios-app-with-katalon/20435 "2019-03-04T12:50:16Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![vinh](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/vinh/32/20464_2.png) [@vinh](https://forum.katalon.com/u/vinh)\ **Post date:** [March 4, 2019, 12:50pm UTC](https://forum.katalon.com/t/cant-start-ios-app-with-katalon/20435/1 "2019-03-04T12:50:16Z")
I got this error when trying to launch iOS app. unable to start application on this device: An unknow server-side error occurred while processing the command. Original error: xcode version ‘0.1’ Support for xcode 0.1 is not supported. please upgrade to version 7.3 or higher ---
**Author:** ![Chris\_Trevarthen](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/chris_trevarthen/32/358_2.png) [@Chris\_Trevarthen](https://forum.katalon.com/u/Chris_Trevarthen)\ **Post date:** [March 4, 2019, 3:05pm UTC](https://forum.katalon.com/t/cant-start-ios-app-with-katalon/20435/2 "2019-03-04T15:05:35Z")
Hi @vinh, You’ll need Appium 1.8.2-beta to work with Katalon Studio and Xcode 10. Please check out this post for more details: > [@Troubleshooting Exceptions on Mobile - (Recommended: KS 7.x + Appium 1.15.1)](http://forum.katalon.com/t/troubleshooting-exceptions-on-mobile/20285): > > Mobile Testing Exception Troubleshooting Tips Here are some common troubleshooting steps to take when you encounter errors trying to spy, record, or execute a mobile test in Katalon Studio: If you see one of the following exceptions, you should check your Appium installation: Execution Exception NullPointerException “java.util.HashMap cannot be cast to org.openqa.selenium.WebElement” “Unable to parse remote response” “Support for xcode 0.1 is not supported. please upgrade to version 7.3 or h… Hope this helps, Chris