2017-02-10

Hi all, my iOS UI automation has been blocked by webview for couple weeks after upgrade to Appium 1.6.x. Could you guys please help me out? Much appreciated!!!

Problem:
Not able to switch to context no matter webview or native view. The error log is: Responding to client with driver.setContext() result: null

System:
Appium version : 1.6.3 & 1.6.4-beta
Platform: iOS 10.2.1
Real device: iPhone 6s, iPhone 6s Plus
Java-client: 5.0Beta
OS - Mac El Capitan 10.11.6
Xcode 8.2.1
iOS-webkit-proxy: 1.7.1

The capabilities are:
capabilities.setCapability("deviceName", mobileDev.getDeviceName());
capabilities.setCapability("app", app.getAbsolutePath());
capabilities.setCapability("platformName", mobileDev.getPlatformName());
capabilities.setCapability("platformVersion", mobileDev.getPlatformVersion());
capabilities.setCapability("autoAcceptAlerts", true);
capabilities.setCapability("autoWebview", false);
capabilities.setCapability("automationName", "XCUITest");
capabilities.setCapability("realDeviceLogger", "/usr/local/lib/node_modules/deviceconsole/deviceconsole");

My test code worked fine on Appium 1.5.3 and I created webveiw switch method as bellow:

The Appium log is following:
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element {"using":"-ios predicate string","value":"name = 'Time with mum is running out'"}
[debug] [MJSONWP] Calling AppiumDriver.findElement() with args: ["-ios predicate string","name = 'Time with mum is running out'","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'findElement'
[debug] [BaseDriver] Valid locator strategies for this request: xpath, id, name, class name, -ios predicate string, accessibility id
[debug] [BaseDriver] Waiting up to 0 ms for condition
[debug] [JSONWP Proxy] Proxying [POST /element] to [POST http://localhost:8100/session/5242C946-12CB-4688-BB3A-A5AAFAD931DB/element] with body: {"using":"predicate string","value":"name = 'Time with mum is running out'"}
[debug] [JSONWP Proxy] Got response with status 200: {"value":{"ELEMENT":"6CD4B557-CAFF-42D0-9CB0-2701AD162B08","type":"XCUIElementTypeStaticText","label":"Time with mum is running out"},"sessionId":"5242C946-12CB-4688-BB3A-A5AAFAD931DB","status":0}
[debug] [MJSONWP] Responding to client with driver.findElement() result: {"ELEMENT":"6CD4B557-CAFF-42D0-9CB0-2701AD162B08","type":"XCUIElementTypeStaticText","label":"Time with mum is running out"}
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element 200 9445 ms - 196
[HTTP] --> GET /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element/6CD4B557-CAFF-42D0-9CB0-2701AD162B08/displayed {}
[MJSONWP] Driver proxy active, passing request on via HTTP proxy
[debug] [XCUITest] Executing command 'proxyReqRes'
[debug] [JSONWP Proxy] Proxying [GET /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element/6CD4B557-CAFF-42D0-9CB0-2701AD162B08/displayed] to [GET http://localhost:8100/session/5242C946-12CB-4688-BB3A-A5AAFAD931DB/element/6CD4B557-CAFF-42D0-9CB0-2701AD162B08/displayed] with body: {}
[debug] [JSONWP Proxy] Got response with status 200: "{\n \"value\" : true,\n \"sessionId\" : \"5242C946-12CB-4688-BB3A-A5AAFAD931DB\",\n \"status\" : 0\n}"
[JSONWP Proxy] Replacing sessionId 5242C946-12CB-4688-BB3A-A5AAFAD931DB with 29c76cb1-9a15-4fe8-a705-7bdc0406141e
[HTTP] <-- GET /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element/6CD4B557-CAFF-42D0-9CB0-2701AD162B08/displayed 200 4659 ms - 76
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element/6CD4B557-CAFF-42D0-9CB0-2701AD162B08/click {"id":"6CD4B557-CAFF-42D0-9CB0-2701AD162B08"}
[MJSONWP] Driver proxy active, passing request on via HTTP proxy
[debug] [XCUITest] Executing command 'proxyReqRes'
[debug] [JSONWP Proxy] Proxying [POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element/6CD4B557-CAFF-42D0-9CB0-2701AD162B08/click] to [POST http://localhost:8100/session/5242C946-12CB-4688-BB3A-A5AAFAD931DB/element/6CD4B557-CAFF-42D0-9CB0-2701AD162B08/click] with body: {"id":"6CD4B557-CAFF-42D0-9CB0-2701AD162B08"}
[debug] [JSONWP Proxy] Got response with status 200: {"status":0,"id":"6CD4B557-CAFF-42D0-9CB0-2701AD162B08","value":"","sessionId":"5242C946-12CB-4688-BB3A-A5AAFAD931DB"}
[JSONWP Proxy] Replacing sessionId 5242C946-12CB-4688-BB3A-A5AAFAD931DB with 29c76cb1-9a15-4fe8-a705-7bdc0406141e
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element/6CD4B557-CAFF-42D0-9CB0-2701AD162B08/click 200 19481 ms - 118
[HTTP] --> GET /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/contexts {}
[debug] [MJSONWP] Calling AppiumDriver.getContexts() with args: ["29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'getContexts'
[debug] [iOS] Getting list of available contexts
[debug] [iOS] Retrieving contexts and views
[debug] [iOS] Selecting by url: false
[debug] [RemoteDebugger] Getting WebKitRemoteDebugger pageArray: localhost, 27753
[debug] [RemoteDebugger] Sending request to: http://localhost:27753/json
[debug] [RemoteDebugger] Page element JSON: [{"devtoolsFrontendUrl":"/devtools/devtools.html?ws=localhost:27753/devtools/page/1","faviconUrl":"","thumbnailUrl":"/thumb/","title":"","url":"","webSocketDebuggerUrl":"ws://localhost:27753/devtools/page/1","appId":"PID:4532"},{"devtoolsFrontendUrl":"/devtools/devtools.html?ws=localhost:27753/devtools/page/2","faviconUrl":"","thumbnailUrl":"/thumb/","title":"","url":"","webSocketDebuggerUrl":"ws://localhost:27753/devtools/page/2","appId":"PID:4532"},{"devtoolsFrontendUrl":"/devtools/devtools.html?ws=localhost:27753/devtools/page/3","faviconUrl":"","thumbnailUrl":"/thumb/https://googleads.g.doubleclick.net/mads/static/sdk/native/sdk-core-v40.html","title":"","url":"https://googleads.g.doubleclick.net/mads/static/sdk/native/sdk-core-v40.html","webSocketDebuggerUrl":"ws://localhost:27753/devtools/page/3","appId":"PID:4532"},{"devtoolsFrontendUrl":"/devtools/devtools.html?ws=localhost:27753/devtools/page/4","faviconUrl":"","thumbnailUrl":"/thumb/https://pubads.g.doubleclick.net/gampad/ads?request_id=3&u_sso=any&ios_base_sdk=10.1&u_mwsso=p&u_so=p&js=afma-sdk-i-v7.13.0&ios_app_volume=1&is_other_audio_playing=0&ios_output_volume=0.583884&eid=318477337&request_origin=pub&ms=N3YgZxiZQj3MiE_n9cyZfVLIIE6Jqzeq92vPk0oh4dUVP9mqIoiv6odRJHlyplwWO4sfmZRN7gWrhf4Cj9EXzAnEWZXLOyW63LqZgwz-FURE4DzjLOnA9AE2GDVTWdINJ8aL0H-49emfDWjPLSU8lOVztnTEcQyClb91swXdG1gMmNYXVWDZ9jJ5v9-i3-jq-TTnE8s_nvY2sTVCXxBGtOq633maZjp9q8hVyEC4qDk3byTPTCSu1pUqS9-jVkzHidljRQG-1fCRdO2jD3lldy-mp8n4c9d_rUj8FPDj0jlrPWcuYAAo5uGa02KJ7c6qPc5KAB2fRz5a9bI4vKFCZQ&hl=en&u_sd=2&ios_key_window_w=375&cellular_country_code=302&u_w=375&ios_radio=CTRadioAccessTechnologyLTE&u_h=667&submodel=iPhone8%2C1&ios_key_window_h=667&cap_bs=1&net=wi&ios_app_muted=0&should_silence_audio=0&cellular_network_code=370&format=300x250_as&_package_name=nz.co.stuff.stuffApp&u_audio=1&an=1003.14.0.4.iphone.nz.co.stuff.stuffApp&swipeable=1&adk=3395089069&crqc=1&currts=4571&seq_num=2&basets=1&output=html&region=mobile_app&u_tz=-300&url=1003.14.0.4.iphone.nz.co.stuff.stuffApp.adsenseformobileapps.com&gdfp_req=1&markup=html&m_ast=afmajs&impl=ifr&iu=%2F6674%2Fiphone.stuff.homepage%2Fcontent&sz=300x250&correlator=2485157171029598&_hl=en-ca&gsb=wi&caps=interactiveVideo_inlineVideo_mraid1_mraid2_th_autoplay_mediation_av_sdkAdmobApiForAds_di_transparentBackground_sdkVideo_aso_sfv_dinm_dim_nav_ct_dinmo&swdr=false&blockAutoClicks=true&cust_params=appid%3D3_14_0%26env%3Dprod%26pos%3Dhomerec%26sv%3Dipn%26apploc&_efs=false&forceHttps=true&includeDoritos=true&uulel=48&blob=ABPQqLFLhJdhoQh1Cj4on1NWeVwoUkaGJikO7BCcmguIVjmN5VOs6J3bC5vRVfkqpO6Xt8yQMlh6k63jxuxZgOMjGtO1zsaDzEFlQJ9qdVajpfUWiIdy4x0o_Ty7JbL8YdRqaUjofnWpNiFh2pPTS8d8u50rEao5Zz2gWXlKZ3pVq2EkhwDu3GkdlBKc4D4noUToq8UkeW5zs-V-DY6TR6NIlSooSxqn8TQ26MZ2FASwYGGcsrJZ0eg0pjdNAoV5dSrTenqHS0uCYr4TFzFJVqCHVfieDUBPdAwNM0jHTwJsbrkV_Hl7XAhfGuneZg&et=44&tcar=46&jsv=4-production-20170207_RC00&urll=1921#caps=interactiveVideo_inlineVideo_mraid1_mraid2_th_autoplay_mediation_av_sdkAdmobApiForAds_di_transparentBackground_sdkVideo_aso_sfv_dinm_dim_nav_ct_dinmo&eid=318477337&format=300x250_as&js=afma-sdk-i-v7.13.0&seq_num=2","title":"","url":"https://pubads.g.doubleclick.net/gampad/ads?request_id=3&u_sso=any&ios_base_sdk=10.1&u_mwsso=p&u_so=p&js=afma-sdk-i-v7.13.0&ios_app_volume=1&is_other_audio_playing=0&ios_output_volume=0.583884&eid=318477337&request_origin=pub&ms=N3YgZxiZQj3MiE_n9cyZfVLIIE6Jqzeq92vPk0oh4dUVP9mqIoiv6odRJHlyplwWO4sfmZRN7gWrhf4Cj9EXzAnEWZXLOyW63LqZgwz-FURE4DzjLOnA9AE2GDVTWdINJ8aL0H-49emfDWjPLSU8lOVztnTEcQyClb91swXdG1gMmNYXVWDZ9jJ5v9-i3-jq-TTnE8s_nvY2sTVCXxBGtOq633maZjp9q8hVyEC4qDk3byTPTCSu1pUqS9-jVkzHidljRQG-1fCRdO2jD3lldy-mp8n4c9d_rUj8FPDj0jlrPWcuYAAo5uGa02KJ7c6qPc5KAB2fRz5a9bI4vKFCZQ&hl=en&u_sd=2&ios_key_window_w=375&cellular_country_code=302&u_w=375&ios_radio=CTRadioAccessTechnologyLTE&u_h=667&submodel=iPhone8%2C1&ios_key_window_h=667&cap_bs=1&net=wi&ios_app_muted=0&should_silence_audio=0&cellular_network_code=370&format=300x250_as&_package_name=nz.co.stuff.stuffApp&u_audio=1&an=1003.14.0.4.iphone.nz.co.stuff.stuffApp&swipeable=1&adk=3395089069&crqc=1&currts=4571&seq_num=2&basets=1&output=html&region=mobile_app&u_tz=-300&url=1003.14.0.4.iphone.nz.co.stuff.stuffApp.adsenseformobileapps.com&gdfp_req=1&markup=html&m_ast=afmajs&impl=ifr&iu=%2F6674%2Fiphone.stuff.homepage%2Fcontent&sz=300x250&correlator=2485157171029598&_hl=en-ca&gsb=wi&caps=interactiveVideo_inlineVideo_mraid1_mraid2_th_autoplay_mediation_av_sdkAdmobApiForAds_di_transparentBackground_sdkVideo_aso_sfv_dinm_dim_nav_ct_dinmo&swdr=false&blockAutoClicks=true&cust_params=appid%3D3_14_0%26env%3Dprod%26pos%3Dhomerec%26sv%3Dipn%26apploc&_efs=false&forceHttps=true&includeDoritos=true&uulel=48&blob=ABPQqLFLhJdhoQh1Cj4on1NWeVwoUkaGJikO7BCcmguIVjmN5VOs6J3bC5vRVfkqpO6Xt8yQMlh6k63jxuxZgOMjGtO1zsaDzEFlQJ9qdVajpfUWiIdy4x0o_Ty7JbL8YdRqaUjofnWpNiFh2pPTS8d8u50rEao5Zz2gWXlKZ3pVq2EkhwDu3GkdlBKc4D4noUToq8UkeW5zs-V-DY6TR6NIlSooSxqn8TQ26MZ2FASwYGGcsrJZ0eg0pjdNAoV5dSrTenqHS0uCYr4TFzFJVqCHVfieDUBPdAwNM0jHTwJsbrkV_Hl7XAhfGuneZg&et=44&tcar=46&jsv=4-production-20170207_RC00&urll=1921#caps=interactiveVideo_inlineVideo_mraid1_mraid2_th_autoplay_mediation_av_sdkAdmobApiForAds_di_transparentBackground_sdkVideo_aso_sfv_dinm_dim_nav_ct_dinmo&eid=318477337&format=300x250_as&js=afma-sdk-i-v7.13.0&seq_num=2","webSocketDebuggerUrl":"ws://localhost:27753/devtools/page/4","appId":"PID:4532"},{"devtoolsFrontendUrl":"/devtools/devtools.html?ws=localhost:27753/devtools/page/5","faviconUrl":"","thumbnailUrl":"/thumb/https://pubads.g.doubleclick.net/gampad/ads?request_id=4&u_sso=any&ios_base_sdk=10.1&u_mwsso=p&u_so=p&js=afma-sdk-i-v7.13.0&ios_app_volume=1&is_other_audio_playing=0&ios_output_volume=0.583884&eid=318477337&request_origin=pub&ms=yjfdUA-sbyWc3fpkpofnIvCxnvG50hmdkF-_gegn66vFwszHHtMkt1IhxbeQC_QsQBk1KljKM6Is1V1dkKGr3wWwMHZs-zXOGU2UZw6ifqIwIZ106Y5cq8IuuAD0T5pGaTrsunXi8VfdLT1fQDVWM0bNLb-7Ycj3VfPr4lFeC2jBYP9r4tJj033LnYjKaLIH6FCgTMYkDKbdbeLmGzGsauY4-0u4mvP_gsuF1Z2CnV1kAVg18CrO8vImBUtzzKm9daxk_3La99bPzQPqlB0bA6XybQ04q8cOiiSrvM9NRYh1hx9O3Dv8A0s9OYN6CvbwqTorcoqipcxOQbVF68jLQA&hl=en&u_sd=2&ios_key_window_w=375&cellular_country_code=302&u_w=375&ios_radio=CTRadioAccessTechnologyLTE&u_h=667&submodel=iPhone8%2C1&ios_key_window_h=667&cap_bs=1&net=wi&ios_app_muted=0&should_silence_audio=0&cellular_network_code=370&format=300x250_as&_package_name=nz.co.stuff.stuffApp&u_audio=1&an=1003.14.0.4.iphone.nz.co.stuff.stuffApp&swipeable=1&adk=3395089069&crqc=2&currts=5921&seq_num=3&basets=1&output=html&region=mobile_app&u_tz=-300&url=1003.14.0.4.iphone.nz.co.stuff.stuffApp.adsenseformobileapps.com&gdfp_req=1&markup=html&m_ast=afmajs&impl=ifr&iu=%2F6674%2Fiphone.stuff.homepage%2Fcontent&sz=300x250&correlator=3235038179414819&_hl=en-ca&gsb=wi&caps=interactiveVideo_inlineVideo_mraid1_mraid2_th_autoplay_mediation_av_sdkAdmobApiForAds_di_transparentBackground_sdkVideo_aso_sfv_dinm_dim_nav_ct_dinmo&swdr=false&blockAutoClicks=true&cust_params=appid%3D3_14_0%26env%3Dprod%26pos%3Dbottomrec%26sv%3Dipn%26apploc&_efs=false&forceHttps=true&includeDoritos=true&uulel=48&blob=ABPQqLF4LxVCQMDG8IWvPtVLk1dx5y-OREG7dM-1CxGq2fO56u_AmAe2ynKqGS6WQHhSU_gOG6H_cHnpBqSuhvz-8UshOMmh61AXE1r-aXLgNjQJDXFAYmC-mZwvoiH1srCBNFfdCnJe3NY3g5FN3KOCo4DBnv5vi1pUeUHMnnBmGVlmzQBMh_7sVjd-F4v7pRQRRPrBxt40BpW1h6GgjqY0lQZQNN0XfTVPiXHxQte5JRZ8qizLr4B2cke2BGFTv5SCUM2oRhsHIwYt_Nu50JhjGlLE1xNmPLBbBOO8Rg1t10_BqkrqbzJks0b0KQ&et=22&tcar=24&jsv=4-production-20170207_RC00&urll=1923#caps=interactiveVideo_inlineVideo_mraid1_mraid2_th_autoplay_mediation_av_sdkAdmobApiForAds_di_transparentBackground_sdkVideo_aso_sfv_dinm_dim_nav_ct_dinmo&eid=318477337&format=300x250_as&js=afma-sdk-i-v7.13.0&seq_num=3","title":"","url":"https://pubads.g.doubleclick.net/gampad/ads?request_id=4&u_sso=any&ios_base_sdk=10.1&u_mwsso=p&u_so=p&js=afma-sdk-i-v7.13.0&ios_app_volume=1&is_other_audio_playing=0&ios_output_volume=0.583884&eid=318477337&request_origin=pub&ms=yjfdUA-sbyWc3fpkpofnIvCxnvG50hmdkF-_gegn66vFwszHHtMkt1IhxbeQC_QsQBk1KljKM6Is1V1dkKGr3wWwMHZs-zXOGU2UZw6ifqIwIZ106Y5cq8IuuAD0T5pGaTrsunXi8VfdLT1fQDVWM0bNLb-7Ycj3VfPr4lFeC2jBYP9r4tJj033LnYjKaLIH6FCgTMYkDKbdbeLmGzGsauY4-0u4mvP_gsuF1Z2CnV1kAVg18CrO8vImBUtzzKm9daxk_3La99bPzQPqlB0bA6XybQ04q8cOiiSrvM9NRYh1hx9O3Dv8A0s9OYN6CvbwqTorcoqipcxOQbVF68jLQA&hl=en&u_sd=2&ios_key_window_w=375&cellular_country_code=302&u_w=375&ios_radio=CTRadioAccessTechnologyLTE&u_h=667&submodel=iPhone8%2C1&ios_key_window_h=667&cap_bs=1&net=wi&ios_app_muted=0&should_silence_audio=0&cellular_network_code=370&format=300x250_as&_package_name=nz.co.stuff.stuffApp&u_audio=1&an=1003.14.0.4.iphone.nz.co.stuff.stuffApp&swipeable=1&adk=3395089069&crqc=2&currts=5921&seq_num=3&basets=1&output=html&region=mobile_app&u_tz=-300&url=1003.14.0.4.iphone.nz.co.stuff.stuffApp.adsenseformobileapps.com&gdfp_req=1&markup=html&m_ast=afmajs&impl=ifr&iu=%2F6674%2Fiphone.stuff.homepage%2Fcontent&sz=300x250&correlator=3235038179414819&_hl=en-ca&gsb=wi&caps=interactiveVideo_inlineVideo_mraid1_mraid2_th_autoplay_mediation_av_sdkAdmobApiForAds_di_transparentBackground_sdkVideo_aso_sfv_dinm_dim_nav_ct_dinmo&swdr=false&blockAutoClicks=true&cust_params=appid%3D3_14_0%26env%3Dprod%26pos%3Dbottomrec%26sv%3Dipn%26apploc&_efs=false&forceHttps=true&includeDoritos=true&uulel=48&blob=ABPQqLF4LxVCQMDG8IWvPtVLk1dx5y-OREG7dM-1CxGq2fO56u_AmAe2ynKqGS6WQHhSU_gOG6H_cHnpBqSuhvz-8UshOMmh61AXE1r-aXLgNjQJDXFAYmC-mZwvoiH1srCBNFfdCnJe3NY3g5FN3KOCo4DBnv5vi1pUeUHMnnBmGVlmzQBMh_7sVjd-F4v7pRQRRPrBxt40BpW1h6GgjqY0lQZQNN0XfTVPiXHxQte5JRZ8qizLr4B2cke2BGFTv5SCUM2oRhsHIwYt_Nu50JhjGlLE1xNmPLBbBOO8Rg1t10_BqkrqbzJks0b0KQ&et=22&tcar=24&jsv=4-production-20170207_RC00&urll=1923#caps=interactiveVideo_inlineVideo_mraid1_mraid2_th_autoplay_mediation_av_sdkAdmobApiForAds_di_transparentBackground_sdkVideo_aso_sfv_dinm_dim_nav_ct_dinmo&eid=318477337&format=300x250_as&js=afma-sdk-i-v7.13.0&seq_num=3","webSocketDebuggerUrl":"ws://localhost:27753/devtools/page/5","appId":"PID:4532"},{"devtoolsFrontendUrl":"/devtools/devtools.html?ws=localhost:27753/devtools/page/6","faviconUrl":"","thumbnailUrl":"/thumb/https://googleads.g.doubleclick.net/mads/static/sdk/native/sdk-core-v40.html","title":"","url":"https://googleads.g.doubleclick.net/mads/static/sdk/native/sdk-core-v40.html","webSocketDebuggerUrl":"ws://localhost:27753/devtools/page/6","appId":"PID:4532"}]
[debug] [MJSONWP] Responding to client with driver.getContexts() result: ["NATIVE_APP","WEBVIEW_3","WEBVIEW_4","WEBVIEW_5","WEBVIEW_6"]
[HTTP] <-- GET /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/contexts 200 16 ms - 134
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context {"name":"WEBVIEW_6"}
[debug] [MJSONWP] Calling AppiumDriver.setContext() with args: ["WEBVIEW_6","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'setContext'
[debug] [iOS] Attempting to set context to 'WEBVIEW_6'
[debug] [RemoteDebugger] WebKit debugger web socket connected to url: ws://localhost:27753/devtools/page/6
[debug] [MJSONWP] Responding to client with driver.setContext() result: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context 200 16 ms - 76
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element {"using":"css selector","value":"*[class='${article.title.class}']"}
[debug] [MJSONWP] Calling AppiumDriver.findElement() with args: ["css selector","*[class='${article.title.class}']","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'findElement'
[debug] [BaseDriver] Valid locator strategies for this request: xpath, id, name, class name, -ios predicate string, accessibility id
[debug] [BaseDriver] Waiting up to 0 ms for condition
[debug] [RemoteDebugger] Executing 'find_element' atom in default context
[debug] [RemoteDebugger] Sending javascript command (function(){return function(){var aa="function"...
[debug] [RemoteDebugger] Sending WebKit data: {"method":"Runtime.evaluate...
[debug] [RemoteDebugger] Receiving WebKit data: {"result":{"result":{"type"...
[debug] [RemoteDebugger] Found handler for message '1'
[debug] [RemoteDebugger] Received result for atom 'find_element' execution: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element 500 162 ms - 164
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context {"name":"NATIVE_APP"}
[debug] [MJSONWP] Calling AppiumDriver.setContext() with args: ["NATIVE_APP","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'setContext'
[debug] [iOS] Attempting to set context to 'NATIVE_APP'
[debug] [RemoteDebugger] Disconnecting from WebKit remote debugger
[debug] [MJSONWP] Responding to client with driver.setContext() result: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context 200 9 ms - 76
[debug] [RemoteDebugger] WebKit remote debugger socket disconnected
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context {"name":"WEBVIEW_5"}
[debug] [MJSONWP] Calling AppiumDriver.setContext() with args: ["WEBVIEW_5","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'setContext'
[debug] [iOS] Attempting to set context to 'WEBVIEW_5'
[debug] [RemoteDebugger] WebKit debugger web socket connected to url: ws://localhost:27753/devtools/page/5
[debug] [MJSONWP] Responding to client with driver.setContext() result: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context 200 8 ms - 76
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element {"using":"css selector","value":"*[class='${article.title.class}']"}
[debug] [MJSONWP] Calling AppiumDriver.findElement() with args: ["css selector","*[class='${article.title.class}']","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'findElement'
[debug] [BaseDriver] Valid locator strategies for this request: xpath, id, name, class name, -ios predicate string, accessibility id
[debug] [BaseDriver] Waiting up to 0 ms for condition
[debug] [RemoteDebugger] Executing 'find_element' atom in default context
[debug] [RemoteDebugger] Sending javascript command (function(){return function(){var aa="function"...
[debug] [RemoteDebugger] Sending WebKit data: {"method":"Runtime.evaluate...
[debug] [RemoteDebugger] Receiving WebKit data: {"result":{"result":{"type"...
[debug] [RemoteDebugger] Found handler for message '1'
[debug] [RemoteDebugger] Received result for atom 'find_element' execution: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element 500 194 ms - 164
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context {"name":"NATIVE_APP"}
[debug] [MJSONWP] Calling AppiumDriver.setContext() with args: ["NATIVE_APP","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'setContext'
[debug] [iOS] Attempting to set context to 'NATIVE_APP'
[debug] [RemoteDebugger] Disconnecting from WebKit remote debugger
[debug] [MJSONWP] Responding to client with driver.setContext() result: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context 200 15 ms - 76
[debug] [RemoteDebugger] WebKit remote debugger socket disconnected
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context {"name":"WEBVIEW_4"}
[debug] [MJSONWP] Calling AppiumDriver.setContext() with args: ["WEBVIEW_4","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'setContext'
[debug] [iOS] Attempting to set context to 'WEBVIEW_4'
[debug] [RemoteDebugger] WebKit debugger web socket connected to url: ws://localhost:27753/devtools/page/4
[debug] [MJSONWP] Responding to client with driver.setContext() result: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context 200 28 ms - 76
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element {"using":"css selector","value":"*[class='${article.title.class}']"}
[debug] [MJSONWP] Calling AppiumDriver.findElement() with args: ["css selector","*[class='${article.title.class}']","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'findElement'
[debug] [BaseDriver] Valid locator strategies for this request: xpath, id, name, class name, -ios predicate string, accessibility id
[debug] [BaseDriver] Waiting up to 0 ms for condition
[debug] [RemoteDebugger] Executing 'find_element' atom in default context
[debug] [RemoteDebugger] Sending javascript command (function(){return function(){var aa="function"...
[debug] [RemoteDebugger] Sending WebKit data: {"method":"Runtime.evaluate...
[debug] [RemoteDebugger] Receiving WebKit data: {"result":{"result":{"type"...
[debug] [RemoteDebugger] Found handler for message '1'
[debug] [RemoteDebugger] Received result for atom 'find_element' execution: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element 500 29 ms - 164
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context {"name":"NATIVE_APP"}
[debug] [MJSONWP] Calling AppiumDriver.setContext() with args: ["NATIVE_APP","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'setContext'
[debug] [iOS] Attempting to set context to 'NATIVE_APP'
[debug] [RemoteDebugger] Disconnecting from WebKit remote debugger
[debug] [MJSONWP] Responding to client with driver.setContext() result: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context 200 3 ms - 76
[debug] [RemoteDebugger] WebKit remote debugger socket disconnected
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context {"name":"WEBVIEW_3"}
[debug] [MJSONWP] Calling AppiumDriver.setContext() with args: ["WEBVIEW_3","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'setContext'
[debug] [iOS] Attempting to set context to 'WEBVIEW_3'
[debug] [RemoteDebugger] WebKit debugger web socket connected to url: ws://localhost:27753/devtools/page/3
[debug] [MJSONWP] Responding to client with driver.setContext() result: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context 200 8 ms - 76
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element {"using":"css selector","value":"*[class='${article.title.class}']"}
[debug] [MJSONWP] Calling AppiumDriver.findElement() with args: ["css selector","*[class='${article.title.class}']","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'findElement'
[debug] [BaseDriver] Valid locator strategies for this request: xpath, id, name, class name, -ios predicate string, accessibility id
[debug] [BaseDriver] Waiting up to 0 ms for condition
[debug] [RemoteDebugger] Executing 'find_element' atom in default context
[debug] [RemoteDebugger] Sending javascript command (function(){return function(){var aa="function"...
[debug] [RemoteDebugger] Sending WebKit data: {"method":"Runtime.evaluate...
[debug] [RemoteDebugger] Receiving WebKit data: {"result":{"result":{"type"...
[debug] [RemoteDebugger] Found handler for message '1'
[debug] [RemoteDebugger] Received result for atom 'find_element' execution: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/element 500 50 ms - 164
[HTTP] --> POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context {"name":"NATIVE_APP"}
[debug] [MJSONWP] Calling AppiumDriver.setContext() with args: ["NATIVE_APP","29c76cb1-9a15-4fe8-a705-7bdc0406141e"]
[debug] [XCUITest] Executing command 'setContext'
[debug] [iOS] Attempting to set context to 'NATIVE_APP'
[debug] [RemoteDebugger] Disconnecting from WebKit remote debugger
[debug] [MJSONWP] Responding to client with driver.setContext() result: null
[HTTP] <-- POST /wd/hub/session/29c76cb1-9a15-4fe8-a705-7bdc0406141e/context 200 8 ms - 76
[debug] [RemoteDebugger] WebKit remote debugger socket disconnected
End testing at : 2017-02-10 11:15:51

A part from that, I tried switch context from Appium 1.5.3 inspector after launched Appium 1.6.x. command lines and ios-webkit-proxy. But the message are:
[debug] [MJSONWP] Responding to client with driver.getContexts() result: ["NATIVE_APP","WEBVIEW_10","WEBVIEW_11","WEBVIEW_12"]
[HTTP] <-- GET /wd/hub/session/1f1fcf32-e228-425b-ac06-1eeb5b111c6a/contexts 200 12 ms - 125
[debug] [XCUITest] Connection to WDA timed out
[debug] [iProxy] recv failed: Operation not permitted
[HTTP] --> POST /wd/hub/session/1f1fcf32-e228-425b-ac06-1eeb5b111c6a/context {"context":"WEBVIEW_11"}
[debug] [MJSONWP] Bad parameters: BadParametersError: Parameters were incorrect. We wanted {"required":["name"]} and you sent ["context"]

Do you folks get this issue and how to deal with it? I did lots of research but unavailable.

Thanks again and have a great weekend!

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