I am getting build time error when using the plugin.

[uc-dve]

dio 4.0.0
dio_retry_fixed: ^0.1.15-beta-null-safety

The issue is inside plugin files here is the error log.

../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:30:32: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
err.request!.extra = err.request!.extra..addAll(extra.toExtra());
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:33:40: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
errorCallback!(ErrorResult(err.request!.uri.toString(), err.message, extra.retries, err.error.toString()));
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:39:15: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
err.request!.path,
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:40:28: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
cancelToken: err.request!.cancelToken,
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:41:21: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
data: err.request!.data,
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:42:34: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
onReceiveProgress: err.request!.onReceiveProgress,
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:43:31: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
onSendProgress: err.request!.onSendProgress,
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:44:32: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
queryParameters: err.request!.queryParameters,
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:45:39: Error: The getter 'request' isn't defined for the class 'DioError'.
- 'DioError' is from 'package:dio/src/dio_error.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/dio_error.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'request'.
options: Options(extra: err.request!.extra),
^^^^^^^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:38:16: Error: A value of type 'Response' can't be returned from an async function with return type 'void'.
- 'Response' is from 'package:dio/src/response.dart' ('../../.pub-cache/hosted/pub.dartlang.org/dio-4.0.0/lib/src/response.dart').
return await dio.request(
^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:48:16: Error: A value of type 'Object' can't be returned from an async function with return type 'void'.
- 'Object' is from 'dart:core'.
return e;
^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:52:25: Error: Too few positional arguments: 2 required, 1 given.
return super.onError(err);
^
../../.pub-cache/hosted/pub.dartlang.org/dio_retry_fixed-0.1.15-beta-null-safety/lib/src/retry_interceptor.dart:52:18: Error: A value of type 'invalid-type' can't be returned from an async function with return type 'void'.
return super.onError(err);
^
Command PhaseScriptExecution failed with a nonzero exit code
FirebasePerformance-gmrrcesyyvkfjbflfjwkdefehdqi
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Constructing build description
Could not build the application for the simulator.
Error launching application on iPhone 12 Pro Max.
Exited (sigterm)

This is my code and there is no issue.

import 'dart:async';
import 'package:dio/dio.dart';
import 'package:dio_retry_fixed/dio_retry_fixed.dart';
// import 'package:dio_firebase_performance/dio_firebase_performance.dart';
// import 'package:dio_retry/dio_retry.dart';
import 'theme_action.dart';
import 'package:path/path.dart' as path;

int _apiCounter = 0;
Dio _dioObj;

Dio get _dio {
  if (_dioObj == null) {
    _dioObj ??= new Dio();
    _dioObj
      ..interceptors.add(RetryInterceptor(
        dio: _dioObj,
        // logger: Logger("Retry"),
        options: RetryOptions(
            retries: 3, // Number of retries before a failure
            retryInterval: const Duration(seconds: 3),
            retryEvaluator: (error) =>
                error.type != DioErrorType.cancel &&
                error.type != DioErrorType.response),
      ));
    // _dioObj.interceptors.add(DioFirebasePerformanceInterceptor());
  }
  return _dioObj;
}

[appsailor]

See if the following inside the pubspec.yaml work for you:

dio: ^4.0.0
dio_retry:
git:
url: https://github.com/appsailor/dio_retry
path: dio_retry

[uc-dve]

dio_retry

I am getting below error while using it can you please update it.

[appsailor]

I've updated the dependencies. You might have to remove the pubspec.lock and do pub get again. See if it works.

[uc-dve]

I've updated the dependencies. You might have to remove the pubspec.lock and do pub get again. See if it works.

Thanks now it is working.
Have ever tried to retry file download. normal get post request is working fine but dio.download gives an error while retrying. below is the screenshot, if you have any idea please share with me.
thanks