diff --git a/ewol/resource/ColorFile.cpp b/ewol/resource/ColorFile.cpp
index 1fc9869a..23da9454 100644
--- a/ewol/resource/ColorFile.cpp
+++ b/ewol/resource/ColorFile.cpp
@@ -40,30 +40,38 @@ void ewol::resource::ColorFile::reload() {
 	}
 	// open and read all json elements:
 	ejson::Document doc;
-	if (false == doc.load(m_name)) {
+	if (doc.load(m_name) == false) {
 		EWOL_ERROR("Can not load file : '" << m_name << "' = " << etk::FSNode(m_name).getFileSystemName());
 		return;
 	}
 	ejson::Array baseArray = doc["color"].toArray();
 	if (baseArray.exist() == false) {
-		EWOL_ERROR("Can not get basic array : 'color'");
+		EWOL_ERROR("Can not get basic array : 'color' in file:" << m_name);
+		doc.display();
 		return;
 	}
+	bool findError = false;
 	for (const auto it : baseArray) {
 		ejson::Object tmpObj = it.toObject();
 		if (tmpObj.exist() == false) {
-			EWOL_DEBUG(" can not get object in 'color' : " << it);
+			EWOL_ERROR(" can not get object in 'color' : " << it);
+			findError = true;
 			continue;
 		}
-		std::string name = tmpObj.getStringValue("name", "");
-		std::string color = tmpObj.getStringValue("color", m_errorColor.getHexString());
+		std::string name = tmpObj["name"].toString().get();
+		std::string color = tmpObj["color"].toString().get(m_errorColor.getHexString());
 		EWOL_DEBUG("find new color : '" << name << "' color='" << color << "'");
 		if (name.size() == 0) {
 			EWOL_ERROR("Drop an empty name");
+			findError = true;
 			continue;
 		}
 		m_list.add(name, etk::Color<float>(color));
 	}
+	if (findError == true) {
+		EWOL_ERROR("pb in parsing file:" << m_name);
+		doc.display();
+	}
 }
 
 
diff --git a/ewol/resource/ConfigFile.cpp b/ewol/resource/ConfigFile.cpp
index 4914130c..c92b4ad3 100644
--- a/ewol/resource/ConfigFile.cpp
+++ b/ewol/resource/ConfigFile.cpp
@@ -72,12 +72,11 @@ double ewol::resource::ConfigFile::getNumber(int32_t _id) {
 	return m_list[_id].toNumber().get();
 }
 
-const std::string& ewol::resource::ConfigFile::getString(int32_t _id) {
+std::string ewol::resource::ConfigFile::getString(int32_t _id) {
 	std::unique_lock<std::recursive_mutex> lock(m_mutex);
-	static const std::string& errorString("");
 	if (    _id < 0
 	     || m_list[_id].exist() == false) {
-		return errorString;
+		return "";
 	}
 	return m_list[_id].toString().get();
 }
diff --git a/ewol/resource/ConfigFile.h b/ewol/resource/ConfigFile.h
index ffa622a8..1f22c4a8 100644
--- a/ewol/resource/ConfigFile.h
+++ b/ewol/resource/ConfigFile.h
@@ -31,7 +31,7 @@ namespace ewol {
 				int32_t request(const std::string& _paramName);
 				
 				double getNumber(int32_t _id);
-				const std::string& getString(int32_t _id);
+				std::string getString(int32_t _id);
 				bool getBoolean(int32_t _id);
 			public:
 				/**
diff --git a/ewol/resource/DistanceFieldFont.cpp b/ewol/resource/DistanceFieldFont.cpp
index 183a740b..211b8d37 100644
--- a/ewol/resource/DistanceFieldFont.cpp
+++ b/ewol/resource/DistanceFieldFont.cpp
@@ -354,22 +354,22 @@ void ewol::resource::DistanceFieldFont::exportOnFile() {
 	ejson::Array tmpList;
 	for (size_t iii=0; iii<m_listElement.size(); ++iii) {
 		ejson::Object tmpObj;
-		tmpObj.addString("m_UVal", etk::to_string(m_listElement[iii].m_UVal));
-		tmpObj.addNumber("m_glyphIndex", m_listElement[iii].m_glyphIndex);
-		tmpObj.addString("m_sizeTexture", (std::string)m_listElement[iii].m_sizeTexture);
-		tmpObj.addString("m_bearing", (std::string)m_listElement[iii].m_bearing);
-		tmpObj.addString("m_advance", (std::string)m_listElement[iii].m_advance);
-		tmpObj.addString("m_texturePosStart", (std::string)m_listElement[iii].m_texturePosStart);
-		tmpObj.addString("m_texturePosSize", (std::string)m_listElement[iii].m_texturePosSize);
-		tmpObj.addBoolean("m_exist", m_listElement[iii].m_exist);
+		tmpObj.add("m_UVal", ejson::String(etk::to_string(m_listElement[iii].m_UVal)));
+		tmpObj.add("m_glyphIndex", ejson::Number(m_listElement[iii].m_glyphIndex));
+		tmpObj.add("m_sizeTexture", ejson::String((std::string)m_listElement[iii].m_sizeTexture));
+		tmpObj.add("m_bearing", ejson::String((std::string)m_listElement[iii].m_bearing));
+		tmpObj.add("m_advance", ejson::String((std::string)m_listElement[iii].m_advance));
+		tmpObj.add("m_texturePosStart", ejson::String((std::string)m_listElement[iii].m_texturePosStart));
+		tmpObj.add("m_texturePosSize", ejson::String((std::string)m_listElement[iii].m_texturePosSize));
+		tmpObj.add("m_exist", ejson::Boolean(m_listElement[iii].m_exist));
 		tmpList.add(tmpObj);
 	}
 	doc.add("m_listElement", tmpList);
-	doc.addNumber("m_sizeRatio", m_sizeRatio);
-	doc.addString("m_lastGlyphPos", (std::string)m_lastGlyphPos);
-	doc.addNumber("m_lastRawHeigh", m_lastRawHeigh);
-	doc.addNumber("m_borderSize", m_borderSize);
-	doc.addString("m_textureBorderSize", (std::string)m_textureBorderSize);
+	doc.add("m_sizeRatio", ejson::Number(m_sizeRatio));
+	doc.add("m_lastGlyphPos", ejson::String(m_lastGlyphPos));
+	doc.add("m_lastRawHeigh", ejson::Number(m_lastRawHeigh));
+	doc.add("m_borderSize", ejson::Number(m_borderSize));
+	doc.add("m_textureBorderSize", ejson::String(m_textureBorderSize));
 	doc.store(m_fileName + ".json");
 	egami::store(m_data, m_fileName + ".bmp");
 	egami::store(m_data, m_fileName + ".png");
@@ -389,11 +389,11 @@ bool ewol::resource::DistanceFieldFont::importFromFile() {
 	ejson::Document doc;
 	doc.load(m_fileName + ".json");
 	
-	m_sizeRatio = doc.getNumberValue("m_sizeRatio", 0);
-	m_lastGlyphPos = doc.getStringValue("m_lastGlyphPos", "0,0");
-	m_lastRawHeigh = doc.getNumberValue("m_lastRawHeigh", 0);
-	m_borderSize = doc.getNumberValue("m_borderSize", 2);
-	m_textureBorderSize = doc.addString("m_textureBorderSize", "0,0");
+	m_sizeRatio = doc["m_sizeRatio"].toNumber().get(0);
+	m_lastGlyphPos = doc["m_lastGlyphPos"].toString().get("0,0");
+	m_lastRawHeigh = doc["m_lastRawHeigh"].toNumber().get(0);
+	m_borderSize = doc["m_borderSize"].toNumber().get(2);
+	m_textureBorderSize = doc["m_textureBorderSize"].toString().get("0,0");
 	ejson::Array tmpList = doc["m_listElement"].toArray();
 	if (tmpList.exist() == false) {
 		EWOL_ERROR("nullptr pointer array");
@@ -406,14 +406,14 @@ bool ewol::resource::DistanceFieldFont::importFromFile() {
 			continue;
 		}
 		GlyphProperty prop;
-		prop.m_UVal = etk::string_to_int32_t(tmpObj.getStringValue("m_UVal", "0"));
-		prop.m_glyphIndex = tmpObj.getNumberValue("m_glyphIndex", 0);
-		prop.m_sizeTexture = tmpObj.getStringValue("m_sizeTexture", "0,0");
-		prop.m_bearing = tmpObj.getStringValue("m_bearing", "0,0");
-		prop.m_advance = tmpObj.getStringValue("m_advance", "0,0");
-		prop.m_texturePosStart = tmpObj.getStringValue("m_texturePosStart", "0,0");
-		prop.m_texturePosSize = tmpObj.getStringValue("m_texturePosSize", "0,0");
-		prop.m_exist = tmpObj.getBooleanValue("m_exist", false);
+		prop.m_UVal = etk::string_to_int32_t(tmpObj["m_UVal"].toString().get("0"));
+		prop.m_glyphIndex = tmpObj["m_glyphIndex"].toNumber().get(0);
+		prop.m_sizeTexture = tmpObj["m_sizeTexture"].toString().get("0,0");
+		prop.m_bearing = tmpObj["m_bearing"].toString().get("0,0");
+		prop.m_advance = tmpObj["m_advance"].toString().get("0,0");
+		prop.m_texturePosStart = tmpObj["m_texturePosStart"].toString().get("0,0");
+		prop.m_texturePosSize = tmpObj["m_texturePosSize"].toString().get("0,0");
+		prop.m_exist = tmpObj["m_exist"].toBoolean().get(false);
 		m_listElement.push_back(prop);
 	}
 	egami::load(m_data, m_fileName + ".bmp");
diff --git a/ewol/translate.cpp b/ewol/translate.cpp
index b6d5c25f..8ed137cc 100644
--- a/ewol/translate.cpp
+++ b/ewol/translate.cpp
@@ -154,13 +154,13 @@ class LocalInstanceTranslation {
 				ejson::Document doc;
 				doc.load(filename);
 				for (auto element : doc.getKeys()) {
-					std::string val = doc.getStringValue(element);
+					std::string val = doc[element].toString().get();
 					m_translate.insert(make_pair(element, val));
 				}
 				filename = itMajor->second + "/" + m_languageDefault + ".json";
 				doc.load(filename);
 				for (auto element : doc.getKeys()) {
-					std::string val = doc.getStringValue(element);
+					std::string val = doc[element].toString().get();
 					auto itTrans = m_translate.find(element);
 					if (itTrans == m_translate.end()) {
 						m_translate.insert(make_pair(element, val));
@@ -179,7 +179,7 @@ class LocalInstanceTranslation {
 				ejson::Document doc;
 				doc.load(filename);
 				for (auto element : doc.getKeys()) {
-					std::string val = doc.getStringValue(element);
+					std::string val = doc[element].toString().get();
 					auto itTrans = m_translate.find(element);
 					if (itTrans == m_translate.end()) {
 						m_translate.insert(make_pair(element, val));
@@ -198,7 +198,7 @@ class LocalInstanceTranslation {
 				ejson::Document doc;
 				doc.load(filename);
 				for (auto element : doc.getKeys()) {
-					std::string val = doc.getStringValue(element);
+					std::string val = doc[element].toString().get();
 					auto itTrans = m_translate.find(element);
 					if (itTrans == m_translate.end()) {
 						m_translate.insert(make_pair(element, val));