RNCoreMl.mainBundlePath is Null on Startup

[chase-robbins]

Running into this issue on startup.

TypeError: null is not an object (evaluating 'RNCoreML.mainBundlePath')
- node_modules/react-native/Libraries/LogBox/LogBox.js:148:8 in registerError
- node_modules/react-native/Libraries/LogBox/LogBox.js:59:8 in errorImpl
- node_modules/react-native/Libraries/LogBox/LogBox.js:33:4 in console.error
- node_modules/expo/build/environment/react-native-logs.fx.js:27:4 in error
- node_modules/react-native/Libraries/Core/ExceptionsManager.js:104:6 in reportException
- node_modules/react-native/Libraries/Core/ExceptionsManager.js:171:19 in handleException
- node_modules/react-native/Libraries/Core/setUpErrorHandling.js:24:6 in handleError
- node_modules/expo-error-recovery/build/ErrorRecovery.fx.js:9:32 in ErrorUtils.setGlobalHandler$argument_0
- node_modules/regenerator-runtime/runtime.js:63:36 in tryCatch
- node_modules/regenerator-runtime/runtime.js:293:29 in invoke
- node_modules/regenerator-runtime/runtime.js:63:36 in tryCatch
- node_modules/regenerator-runtime/runtime.js:154:27 in invoke
- node_modules/regenerator-runtime/runtime.js:164:18 in PromiseImpl.resolve.then$argument_0
- node_modules/react-native/node_modules/promise/setimmediate/core.js:37:13 in tryCallOne
- node_modules/react-native/node_modules/promise/setimmediate/core.js:123:24 in setImmediate$argument_0
- node_modules/react-native/Libraries/Core/Timers/JSTimers.js:130:14 in _callTimer
- node_modules/react-native/Libraries/Core/Timers/JSTimers.js:181:14 in _callImmediatesPass
- node_modules/react-native/Libraries/Core/Timers/JSTimers.js:441:30 in callImmediates
- node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:387:6 in __callImmediates
- node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:135:6 in __guard$argument_0
- node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:364:10 in __guard
- node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:134:4 in flushedQueue
* [native code]:null in flushedQueue
* [native code]:null in invokeCallbackAndReturnFlushedQueue

[chase-robbins]

I think I will need to eject from Expo to get this to work. I'll report back soon.

[chase-robbins]

Ejecting from expo doesn't seem to have solved the problem.
Parallel issue here: https://stackoverflow.com/questions/65803461/mainbundlepath-is-null-for-node-package

[retrx0]

Hi @chase-robbins, I am stuck at this too, were you able to resolve the issue?

[retrx0]

Also will this work with core ml's text classification or only image?

[syedwshah]

My code looks like this:

const NetworkMLModelPath =
  'https://github.com/hollance/MobileNet-CoreML/raw/master/MobileNet.mlmodel';

const coreml = async (pathToImage: string) => {
  try {
    const {jobId, promise} = RNFS.downloadFile({
      fromUrl: NetworkMLModelPath,
      toFile: `${RNFS.MainBundlePath}/MobileNetV2.mlmodel`,
    });

    await promise;
    console.log('jobId', jobId);

    const [{name, path, isFile}] = await RNFS.readDir(`${RNFS.MainBundlePath}`);
    console.log('path', path);

    const modelPath = await compileModel(
      `${RNFS.MainBundlePath}/MobileNetV2.mlmodel`,
    );
    // const {label, confidence} = await classifyTopValue(pathToImage, modelPath);
    // console.log('The image is a ' + label + '. I think. ');
  } catch (error) {
    console.log(error);
  }
};

But it doesn't work and my output is:

 LOG  jobId 17
 LOG  path /private/var/containers/Bundle/Application/1BF72CFE-3E5E-4B47-93B5-69F52C044E2D/RNCoreMLApp.app/MobileNetV2.mlmodelc
 ERROR  TypeError: null is not an object (evaluating 'RNCoreML.mainBundlePath')
 LOG  [TypeError: undefined is not an object (evaluating '_$$_REQUIRE(_dependencyMap[6], "react-native-coreml").compileModel')]