diff --git a/src/InputOutput/IHMImpl/ParamInfo/IHMInputOutputParamInfoClass.php b/src/InputOutput/IHMImpl/ParamInfo/IHMInputOutputParamInfoClass.php
index 6480729..4573797 100644
--- a/src/InputOutput/IHMImpl/ParamInfo/IHMInputOutputParamInfoClass.php
+++ b/src/InputOutput/IHMImpl/ParamInfo/IHMInputOutputParamInfoClass.php
@@ -93,7 +93,8 @@ class IHMInputOutputParamInfoClass implements InputOutputInterface
 		if (($data->getResult() != NULL) && ($data->getResult()->getName() == "plot") && (count($data->getResult()->getChildren()) >= 1)) {
 			$result_data = array();
 				
-			$panelNode = $data->getResult()->getChildren()[0];
+			$panelNodes = $data->getResult()->getChildren();
+			$panelNode = $panelNodes[0];
 				
 			$plotNode = NULL;
 			if (count($panelNode->getChildren()) >= 1) {
@@ -234,14 +235,17 @@ class IHMInputOutputParamInfoClass implements InputOutputInterface
 		if (!isset($drawNode))
 			return;
 		
-		if (!empty($drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_YAXIS)))
-			$result_array['spectro-yaxis'] = $drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_YAXIS);
+		$yAxis = $drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_YAXIS);
+		if (!empty($yAxis))
+			$result_array['spectro-yaxis'] = $yAxis;
 		
-		if (!empty($drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_MIN)))
-			$result_array['spectro-value-min'] = $drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_MIN);
+		$min = $drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_MIN);
+		if (!empty($min))
+			$result_array['spectro-value-min'] = $min;
 		
-		if (!empty($drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_MAX)))
-			$result_array['spectro-value-max'] = $drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_MAX);
+		$max = $drawNode->getAttribute(REQUESTOUTPUTPLOTSPECTRO_MAX);
+		if (!empty($max))
+			$result_array['spectro-value-max'] = $max;
 	}
 	
 	private function unmarshallAdditionalObjectsData($plotNode) {
@@ -299,7 +303,8 @@ class IHMInputOutputParamInfoClass implements InputOutputInterface
 			$this->unmarshallSymbolData($drawNode->getSymbol(), "serie-symbols-", $result_array);
 		}
 		
-		if (!empty($drawNode->getColorSerieId())) {
+		$colorSerieId = $drawNode->getColorSerieId();
+		if (!empty($colorSerieId)) {
 			//ToDo
 		}
 		
diff --git a/src/InputOutput/IHMImpl/Params/IHMInputOutputParamsAbstractClass.php b/src/InputOutput/IHMImpl/Params/IHMInputOutputParamsAbstractClass.php
index be3d888..1d027b3 100644
--- a/src/InputOutput/IHMImpl/Params/IHMInputOutputParamsAbstractClass.php
+++ b/src/InputOutput/IHMImpl/Params/IHMInputOutputParamsAbstractClass.php
@@ -54,7 +54,8 @@ abstract class IHMInputOutputParamsAbstractClass implements InputOutputInterface
 	*/
 	protected function unmarshallTimeDefinition($input, $requestIndex, $ttFileIndex = -1, $ttIntIndex = -1)
 	{
-		$timesNode = $this->paramsData->getRequestNodes()[$requestIndex]->getTimesNode();
+		$requestNodes = $this->paramsData->getRequestNodes();
+		$timesNode = $requestNodes[$requestIndex]->getTimesNode();
 
 		switch ($input->timesrc)
 		{
diff --git a/src/Request/ParamsRequestImpl/Nodes/Params/ParamNodeClass.php b/src/Request/ParamsRequestImpl/Nodes/Params/ParamNodeClass.php
index a51d9ce..e02a574 100644
--- a/src/Request/ParamsRequestImpl/Nodes/Params/ParamNodeClass.php
+++ b/src/Request/ParamsRequestImpl/Nodes/Params/ParamNodeClass.php
@@ -101,8 +101,10 @@ class ParamNodeClass extends NodeClass
 		$getNode = $this->getChildInstanceByName(PARAM_GET, false);
 		if (!$getNode)
 			return NULL;
-		if (count($getNode->getChildren()) > 0)
-			return $getNode->getChildren()[0];
+		if (count($getNode->getChildren()) > 0) {
+			$getNodes = $getNode->getChildren();
+			return $getNodes[0];
+		}
 		return NULL;
 	}
 
diff --git a/src/Request/ParamsRequestImpl/Nodes/Requests/RequestOutputPlotPanelNodeClass.php b/src/Request/ParamsRequestImpl/Nodes/Requests/RequestOutputPlotPanelNodeClass.php
index 294a338..deb58bf 100644
--- a/src/Request/ParamsRequestImpl/Nodes/Requests/RequestOutputPlotPanelNodeClass.php
+++ b/src/Request/ParamsRequestImpl/Nodes/Requests/RequestOutputPlotPanelNodeClass.php
@@ -6,6 +6,7 @@ require_once("RequestOutputPlotElementStatusNodeClass.php");
 require_once("RequestOutputPlotElementTickNodeClass.php");
 require_once "RequestOutputPlotElementEpochNodeClass.php";
 require_once "RequestOutputPlotElementInstantNodeClass.php";
+require_once "RequestOutputPlotFontNodeClass.php";
 
 define ("REQUESTOUTPUTPLOTPANEL_NAME", "panel");
 define ("REQUESTOUTPUTPLOTPANEL_TITLE", "title");
--
libgit2 0.21.2