diff --git a/rpc.cpp b/rpc.cpp
index 113de85a..422113a4 100644
--- a/rpc.cpp
+++ b/rpc.cpp
@@ -628,6 +628,8 @@ Value getbalance(const Array& params, bool fHelp)
     if (params.size() == 0)
         return ((double)GetBalance() / (double)COIN);
 
+    throw runtime_error("under construction"); //// to be released soon
+
     string strAccount = params[0].get_str();
     int nMinDepth = 1;
     if (params.size() > 1)
diff --git a/serialize.h b/serialize.h
index a289769f..a3cfa9c0 100644
--- a/serialize.h
+++ b/serialize.h
@@ -22,7 +22,7 @@ class CDataStream;
 class CAutoFile;
 static const unsigned int MAX_SIZE = 0x02000000;
 
-static const int VERSION = 31601;
+static const int VERSION = 31602;
 static const char* pszSubVer = "";