This is the log i get on executing that line,
RuntimeException: An error occurred while executing user supplied JavaScript. (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 1.65 seconds
Build info: version: '2.48.2', revision: '41bccdd', time: '2015-10-09 19:55:52'
System info: host: 'vinays-mac-mini.kor.apac.bosch.com', ip: '10.170.182.51', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.10.5', java.version: '1.8.0_65'
Driver info: io.appium.java_client.ios.IOSDriver
Capabilities [{app=/Users/Vinay/Library/Developer/Xcode/DerivedData/Measuring_Master-dliiwfkdudwclsfwqistglfqgzyj/Build/Products/Debug-iphonesimulator/Measuring Master.app, networkConnectionEnabled=false, warnings={}, databaseEnabled=false, deviceName=iPhone 5s, platform=MAC, desired={app=/Users/Vinay/Library/Developer/Xcode/DerivedData/Measuring_Master-dliiwfkdudwclsfwqistglfqgzyj/Build/Products/Debug-iphonesimulator/Measuring Master.app, appium-version=1.4.13, platformVersion=9.1, platformName=iOS, deviceName=iPhone 5s}, appium-version=1.4.13, platformVersion=9.1, webStorageEnabled=false, locationContextEnabled=false, browserName=iOS, takesScreenshot=true, javascriptEnabled=true, platformName=iOS}]
Session ID: 13d680f6-05f5-43a5-ba7a-89a4943098ed
private static final String JavascriptExecutor = null;
public static AppiumDriver driver;
//TouchAction action = new TouchAction((MobileDriver) driver);
public static JavascriptExecutor js = (JavascriptExecutor) driver;
TouchAction swipe = new TouchAction(driver);
Please let me know if you need any more info.