Sending array from arduino to of

Yes,

im am sending a string like following from arduino. Thats works fine:

String index = String(1);
String val = String(random(1024));
Serial.print(index + "," + val);
Serial.println("");

But when spliting this to get the single values and put them into a vector I am having segmentation errors.
Here is the collected OF code:

vector<int> values;

values.resize(100);
		for(int i = 0; i < values.size(); i++){
		  values[i] = 0; // set value using index
		}

void ofApp::onSerialBuffer(const ofx::IO::SerialBufferEventArgs& args)
{
    // Buffers will show up here when the marker character is found.
    //SerialMessage message(args.getBuffer().toString(), "", 500);
		vector<string> result = ofSplitString(args.getBuffer().toString(),",");

		if(ofToInt(result[0]) < values.size()){
			if(ofToInt(result[1]) < 1024){
				values[ofToInt(result[0])] = ofToInt(result[1]);
			}
		}

		//cout << values[1] << endl;
    //serialMessages.push_back(message);
}