Retrieving IBM Watson Links "Forwarding Failed" (status_code 500)

I am sending some of the text to the IBM / Watson Relationship Retrieval Service, but I get the following response after about 90 seconds:

{"status": {"message": "Forwarding error", "status_code": 500}}

Most small files work fine and results are expected. However, this file is large (200K).

Here's my code:

set_time_limit(0);

$curl = curl_init();
$post_args = array(
'txt' => $data,
'sid' => 'ie-en-news',
'rt' => 'json' 
);

curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $post_args);
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($curl, CURLOPT_URL, "https://gateway.watsonplatform.net/relationship-extraction-beta/api/v1/sire/0");
curl_setopt($curl, CURLOPT_USERPWD, "XXXXXXXXXXXXX:XXXXXXXXXXXXX");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT ,0);
curl_setopt($curl, CURLOPT_TIMEOUT, 600); 

$result = curl_exec($curl);
curl_close($curl);

$decoded = json_decode($result, true);
echo "RESPONSE: [<Br/><pre>$result</pre><br/>]";

      

        
        
        
      

    

I tried increasing the timeout values ​​using set_time_limit()

, CURLOPT_CONNECTTIMEOUT

and CURLOPT_TIMEOUT

, but it didn't matter.