diff --git a/src/EterLib/NetStream.cpp b/src/EterLib/NetStream.cpp
index a18b372..1041060 100644
--- a/src/EterLib/NetStream.cpp
+++ b/src/EterLib/NetStream.cpp
@@ -1,12 +1,15 @@
 #include "StdAfx.h"
 #include "NetStream.h"
 //#include "eterCrypt.h"
+#include <iomanip>
 
 #ifndef _IMPROVED_PACKET_ENCRYPTION_
 #include "EterBase/tea.h"
 #endif
 
-//#define _PACKETDUMP
+#ifdef _DEBUG
+#define _PACKETDUMP
+#endif
 
 #ifndef _IMPROVED_PACKET_ENCRYPTION_
 void CNetworkStream::SetSecurityMode(bool isSecurityMode, const char* c_szTeaKey)
@@ -721,25 +724,37 @@ bool CNetworkStream::Recv(int size)
 	return true;
 }
 
+static std::string dump_hex(const uint8_t* ptr, const std::size_t length)
+{
+	if (!ptr || !length)
+		return {};
+
+	std::stringstream ss;
+
+	std::vector <uint8_t> buffer(length);
+	memcpy(&buffer[0], ptr, length);
+
+	for (size_t i = 0; i < length; ++i)
+		ss << std::hex << std::setfill('0') << std::setw(2) << (int)buffer.at(i) << ", ";
+
+	const auto str = ss.str();
+	return str.substr(0, str.size() - 2);
+}
+
 bool CNetworkStream::Recv(int size, char * pDestBuf)
 {
 	if (!Peek(size, pDestBuf)) 
 		return false;
 	
 #ifdef _PACKETDUMP
-	if (*pDestBuf != 0 )
+	if (*pDestBuf != 0)
 	{
-		TraceError("RECV< %s (%d)", GetRecvHeaderName(*pDestBuf), size);
-		std::string contents;
-		char buf[10];
-		for(int i = 1; i < size; i++)
-		{
-			sprintf(buf," %02x", (unsigned char)(pDestBuf[i]));
-			contents.append(buf);
-		}
-		TraceError(contents.c_str());
+		const auto kHeader = *pDestBuf;
+		TraceError("RECV< %s %u(0x%X) (%d)", GetRecvHeaderName(kHeader), kHeader, kHeader, size);
+
+		const auto contents = dump_hex(reinterpret_cast<const uint8_t*>(pDestBuf), size);
+		TraceError("%s", contents.c_str());
 	}
-		
 #endif
 
 	m_recvBufOutputPos += size;
@@ -762,18 +777,13 @@ bool CNetworkStream::Send(int size, const char * pSrcBuf)
 	m_sendBufInputPos += size;
 
 #ifdef _PACKETDUMP
-	if (*pSrcBuf != 0 )
+	if (*pSrcBuf != 0)
 	{
-		TraceError("SEND> %s (%d)", GetSendHeaderName(*pSrcBuf), size);
-		std::string contents;
-		char buf[10];
-		for(int i = 1; i < size; i++)
-		{
-			sprintf(buf," %02x", (unsigned char)(pSrcBuf[i]));
-			contents.append(buf);
-		}
-		TraceError(contents.c_str());
+		const auto kHeader = *pSrcBuf;
+		TraceError("SEND> %s %u(0x%X) (%d)", GetRecvHeaderName(kHeader), kHeader, kHeader, size);
 
+		const auto contents = dump_hex(reinterpret_cast<const uint8_t*>(pSrcBuf), size);
+		TraceError("%s", contents.c_str());
 	}
 #endif
 
diff --git a/src/UserInterface/PythonNetworkStream.cpp b/src/UserInterface/PythonNetworkStream.cpp
index aa04661..d87b6a8 100644
--- a/src/UserInterface/PythonNetworkStream.cpp
+++ b/src/UserInterface/PythonNetworkStream.cpp
@@ -182,7 +182,7 @@ class CMainPacketHeaderMap : public CNetworkPacketHeaderMap
 		}
 };
 
-int g_iLastPacket[2] = { 0, 0 };
+static std::vector <uint8_t> gs_vecLastHeaders;
 
 void CPythonNetworkStream::ExitApplication()
 {
@@ -526,7 +526,10 @@ bool CPythonNetworkStream::CheckPacket(TPacketHeader * pRetHeader)
 
 	if (!s_packetHeaderMap.Get(header, &PacketType))
 	{
-		TraceError("Unknown packet header: %d, last: %d %d", header, g_iLastPacket[0], g_iLastPacket[1]);
+		TraceError("Unknown packet header: %u(0x%X), Phase: %s, Last packets:", header, header, m_strPhase.c_str());
+		for (const auto& it : gs_vecLastHeaders)
+			TraceError("%u(0x%X)", it, it);
+
 		ClearRecvBuffer();
 
 		PostQuitMessage(0);
@@ -553,11 +556,15 @@ bool CPythonNetworkStream::CheckPacket(TPacketHeader * pRetHeader)
 	{
 		if (!Peek(PacketType.iPacketSize))
 		{
-			TraceError("Not enough packet size: header %d packet size: %d, recv buffer size: %d (last: %d %d)",
+			TraceError("Not enough packet size: header %d packet size: %d, recv buffer size: %d last packets:",
 				header,
 				PacketType.iPacketSize,
-				GetRecvBufferSize(),
-				g_iLastPacket[0], g_iLastPacket[1]);
+				GetRecvBufferSize()
+			);
+
+			for (const auto& it : gs_vecLastHeaders)
+				TraceError("%u(0x%X)", it, it);
+
 			return false;
 		}
 	}
@@ -567,8 +574,12 @@ bool CPythonNetworkStream::CheckPacket(TPacketHeader * pRetHeader)
 
 	*pRetHeader = header;	
 
-	g_iLastPacket[0] = g_iLastPacket[1];
-	g_iLastPacket[1] = header;
+	// Add to last headers, if last header is contain more than 10 headers, remove first header
+	if (gs_vecLastHeaders.size() > 10)
+		gs_vecLastHeaders.erase(gs_vecLastHeaders.begin());
+
+	gs_vecLastHeaders.push_back(header);
+
 	//Tracenf("header %d size %d", header, PacketType.iPacketSize);
 	//Tracenf("header %d size %d outputpos[%d] security %u", header, PacketType.iPacketSize, m_recvBufOutputPos, IsSecurityMode());
 	return true;
@@ -576,8 +587,9 @@ bool CPythonNetworkStream::CheckPacket(TPacketHeader * pRetHeader)
 
 bool CPythonNetworkStream::RecvErrorPacket(int header)
 {
-	TraceError("Phase %s does not handle this header (header: %d, last: %d, %d)",
-		m_strPhase.c_str(), header, g_iLastPacket[0], g_iLastPacket[1]);
+	TraceError("Phase %s does not handle this header (header: %u(0x%X)) Last packets: ", m_strPhase.c_str(), header);
+	for (const auto& it : gs_vecLastHeaders)
+		TraceError("%u(0x%X)", it, it);
 
 	ClearRecvBuffer();
 	return true;