Service call returning false

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Hello,

I'm trying to make a service call that keeps returning false using c++ code but works fine in the command line.
Can't find much information on reasons for the call function to return to or failure causes.

Here is the command line call:

rosservice call /service/url "request: '1.0'"

Outcome:

[Cheery success message from server]

And the cpp code:

bool ExampleListener::send(const std::string& _request, std::string& _resp) {
  namespace__::ss::Request rosRequest;
  rosRequest.request = _request;
  namespace__::ss::Response rosResponse;

  if(client.call(rosRequest, rosResponse)) {
      _resp = rosResponse.response;
      return true;
  }else {
      ROS_ERROR("Call to server failed, because of reasons.");
      return false;
  }
}

// some other place in code
std::string _resp;
send("1.0", _resp);

The service is defined as follows:

string request
---
string response

Outcome:

[ERROR] [1470218877.683985359, 8.242000000]: Call to server failed, because of reasons.

Any info would be greatly appreciated.