TypeError: Cannot read property 'send' of null

[subhojitdas]

Hi,

I am using Appium( Version 1.3.6 (Ophiuchus) ) to connect to a real iOS device( the devices are licensed via developer.apple.com and certificate to access the devices are done ). From a java client I am trying to open few sites in the real devices. If I try to open multiple sites sequentially, the first site is opening and from 2nd on, I am getting the below error

info: [debug] [REMOTE] Navigating to new URL: http://www.mommyish.com/2015/02/26/parents-tattoo-daughters-birthmark-photos/
info: [debug] [REMOTE] Remote debugger data sent [{"method":"Page.navigate","params":{"objectGroup":"console","includeCommandLineAPI":true,"doNotPauseOnExceptionsAndMuteConsole":true,"url":"http://www.mommyish.com/2015/02/26/parents-tattoo-daughters-...]

TypeError: Cannot read property 'send' of null
at WebKitRemoteDebugger.send (/Applications/Appium.app/Contents/Resources/node_modules/appium/lib/devices/ios/webkit-remote-debugger.js:164:14)
at RemoteDebugger.navToUrl (/Applications/Appium.app/Contents/Resources/node_modules/appium/lib/devices/ios/remote-debugger.js:366:8)
at iOSController.url (/Applications/Appium.app/Contents/Resources/node_modules/appium/lib/devices/ios/ios-controller.js:1468:17)
at Object.exports.postUrl as handle
at next_layer (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/express/lib/router/route.js:113:13)
at Route.dispatch (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/express/lib/router/route.js:117:5)
at /Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/express/lib/router/index.js:222:24
at param (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/express/lib/router/index.js:307:14)
at param (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/express/lib/router/index.js:323:14)
at Function.proto.process_params (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/express/lib/router/index.js:367:3)

info: <-- POST /wd/hub/session/2ed94667-1b42-4af1-9681-0309567e38b0/url 500 2.476 ms - 89

Could you please provide some solution of this issue.