diff --git a/init.js b/init.js
index 8fa7f23..d04f27e 100644
--- a/init.js
+++ b/init.js
@@ -16,6 +16,20 @@
  // Load log system
  require('./lib/logger.js');
 
+ // Initialize log system
+ var logSystem = 'master';
+ require('./lib/exceptionWriter.js')(logSystem);
+
+ // Pool informations
+ log('info', logSystem, 'Starting Cryptonote Node.JS pool version %s', [version]);
+
+ // Check configuration data
+ var poolAddress = config.poolServer.poolAddress || null;
+ if (!poolAddress || poolAddress.match(/(\s+|\*)/)) {
+        log('error', logSystem, 'Invalid pool wallet address in configuration file (poolServer.poolAddress)');
+        process.exit();
+ }
+
  // Initialize redis database client
  var redis = require('redis');
 
@@ -61,13 +75,6 @@
  	return;
  }
 
- // Initialize log system
- var logSystem = 'master';
- require('./lib/exceptionWriter.js')(logSystem);
-
- // Pool informations
- log('info', logSystem, 'Starting Cryptonote Node.JS pool version %s', [version]);
-
  // Developer donations
  if (devFee < 0.2)
  	log('info', logSystem, 'Developer donation \(devDonation\) is set to %d\%, Please consider raising it to 0.2\% or higher !!!', [devFee]);
diff --git a/lib/charts.js b/lib/charts.js
index 0597492..51f76c3 100644
--- a/lib/charts.js
+++ b/lib/charts.js
@@ -92,12 +92,16 @@ let preSaveFunctions = {
 // Store collected values in redis database
 function storeCollectedValues (chartName, values, settings) {
 	for (let i in values) {
-		storeCollectedValue(chartName + ':' + i, [values[i]], settings);
+		if (values[i]) {
+			storeCollectedValue(chartName + ':' + i, [values[i]], settings);
+		}
 	}
 }
 
 // Store collected value in redis database
 function storeCollectedValue (chartName, values, settings) {
+	if (!values) { return false; }
+
 	let now = new Date() / 1000 | 0;
 	values.forEach((value, index) => {
 		let name = `${chartName}` + (index === 0 ? '' : 'Solo')