Angular 4 - Observable catch error : <p>How can I solve the problem of return with error, use the capture inside the Observable?</p>

<p>I want to execute a function inside the catch, to do some validation before the subscribe is executed.</p>

<p>Thank you in advance, thank you very much for your attention.</p>

<p>Error occurs  in -> .catch( (e) => {console.log(e)} )</p>

<pre><code>import { Injectable } from '@angular/core';
import { Headers, Http, ResponseOptions} from '@angular/http';
import { AuthHttp } from 'angular2-jwt';

import { MEAT_API } from '../app.api';

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';

@Injectable()
export class  CompareNfeService {


    constructor(private http: AuthHttp) { }

    envirArquivos(order): Observable&lt;any&gt; {
        const headers = new Headers();
        return this.http.post(`${MEAT_API}compare/arquivo`, order,
        new ResponseOptions({headers: headers}))
        .map(response =&gt; response.json())
        .catch( (e) =&gt; {console.log(e)} );
    }
}
</code></pre>

<p>Error</p>

<blockquote>
  <p>ERROR in /XXXXXX/application/src/app/compare/service.ts (28,17):
  Argument of type '(e: any) => void' is not assignable to parameter of
  type '(err: any, caught: Observable) => ObservableInput&lt;{}>'.<br>
  Type 'void' is not assignable to type 'ObservableInput&lt;{}>'.</p>
</blockquote>
