TypeError: Cannot read property ‘app’ of undefined

Code which i’m using:

String host = “http://127.0.0.1”;
int port = 4723;

DriverService service = new AppiumServiceBuilder()
.usingDriverExecutable(new File(“C:/Program Files/nodejs/node.exe”))
.withAppiumJS(new File(“C:/Users/M1040308/AppData/Local/Programs/Appium/resources/app/main.js”))
.withIPAddress(host.split("//")[1])
.usingPort(port)
.withLogFile(new File(“D:/web_selenium”))
.build();
service.start();

Thanks Zuzeac… Let me to try!!!

Hi,
Getting the below issue
Invalid server instance exception has occured: There is no installed nodes! Please install node via NPM (https://www.npmjs.com/package/appium#using-node-js1) or download and install Appium app (http://appium.io/downloads.html)

is there any version problem, Since I’m using

Appium V1.6.2
NPM 5.3.0

public static void startServer(){

log.info("Building and starting the server:");
builder = new AppiumServiceBuilder();
builder.usingPort(APPIUM_PORT);
builder.withCapabilities(capabilities);
builder.withArgument(GeneralServerFlag.SESSION_OVERRIDE);
builder.withArgument(GeneralServerFlag.LOG_LEVEL, "error");
service = AppiumDriverLocalService.buildService(builder);
service.start();
log.info("Server started on Port - " + APPIUM_PORT);

}

In this where you have mentioned the path for Node.js and Appium.js path pls,advice me, below is the my previous code for your refernce,

DriverService service = new AppiumServiceBuilder()
.usingDriverExecutable(new File(“D:/nodejs/node.exe”))
.withAppiumJS(new File(“C:/Program Files (x86)/nodejs/node.exe”))
.withIPAddress(host.split("//")[1])
.usingPort(port)
.withLogFile(new File(“D:/web_selenium”))
.build();
service.start();

Yes I ran with same code in terminal including Admin mode, getting the same error what arising in eclipse.

my doubt is , where you are pointing your node and appium js locations,

log.info(“Building and starting the server:”);
builder = new AppiumServiceBuilder();
builder.usingPort(APPIUM_PORT);
builder.withCapabilities(capabilities);
builder.withArgument(GeneralServerFlag.SESSION_OVERRIDE);
builder.withArgument(GeneralServerFlag.LOG_LEVEL, “error”);
service = AppiumDriverLocalService.buildService(builder);
service.start();
log.info("Server started on Port - " + APPIUM_PORT);

Hi Zuzeac First of all thanks for your continuous support from your end…I have completed my appium automation work which means i set configuration and all in the starting stage itself also my script i working till nw…the only thing i’m trying to include here is, the server should be opened automatically by using script…

So the application is work as i expect if starts Appium server by manually.

my doubt is ,

builder = new AppiumServiceBuilder();
builder.usingPort(APPIUM_PORT);
builder.withCapabilities(capabilities);
builder.withArgument(GeneralServerFlag.SESSION_OVERRIDE);
builder.withArgument(GeneralServerFlag.LOG_LEVEL, “error”);
service = AppiumDriverLocalService.buildService(builder);
service.start();

where you are using node and appium js path and all.

Yep Zuzeac, I have Appium desktop app, But not installed through npm so that we get that error as you stated (Which means not configured properly), Let me to uninstall the appium and reinstall the same using npm.

Great Zuzeac!!! Its working for me…Thanks a lot for your effort!!! Let me know if any clarification needed in this!!

Hi ZuZeac,
Appium server getting struck in in a certain page while running automation , even-though used implicit wait (200 sec)…its waiting…then show its web element exception. Any idea in this, also tried with driver.openNotifications() too00…

Yes server get struck at the certain screen it self
Twice or thrice out of 10 times…sorry used before explicit wait 200 secs…wrongly mentioned as implicit wait