diff --git a/src/display_wallet.cpp b/src/display_wallet.cpp
index 9c52a99..74502fc 100644
--- a/src/display_wallet.cpp
+++ b/src/display_wallet.cpp
@@ -13,10 +13,13 @@ display_wallet::display_wallet(wxWindow* parent, wxFileName& walletfile) :
 			walletfile.GetFullPath().append(" does not exist.").ToUTF8(),
 			__LINE__, __func__, SrcFilename);
 		m_db.reset(Sqlite3_open(walletfile.GetFullPath().ToUTF8()));
-		sql_read_from_misc read_from_misc(m_db);
-		if (!read_from_misc(1) || read_from_misc.value<int64_t>() != WALLET_FILE_IDENTIFIER)throw MyException(sz_unrecognizable_wallet_file_format);
-		if (!read_from_misc(2) || read_from_misc.value<int64_t>() != WALLET_FILE_SCHEMA_VERSION_0_0 || !read_from_misc(4))throw MyException(sz_unrecognized_wallet_schema);
-		m_MasterSecret= *read_from_misc.value<ristretto255::scalar>();
+		m_read_from_misc.reset(new sql_read_from_misc(m_db));
+		m_read_names_and_keys.reset(new ro::sql(m_db,
+			R"|(SELECT	"Names".name AS name, "Keys".pubkey AS pubkey FROM "Names" INNER JOIN "Keys" )|"
+			R"|(ON "Names"."ROWID"="Keys".id AND "Keys".use=1 ORDER BY LOWER(name), name COLLATE BINARY;)|"));
+		if (!(*m_read_from_misc)(1) || m_read_from_misc->value<int64_t>() != WALLET_FILE_IDENTIFIER)throw MyException(sz_unrecognizable_wallet_file_format);
+		if (!(*m_read_from_misc)(2) || m_read_from_misc->value<int64_t>() != WALLET_FILE_SCHEMA_VERSION_0_0 || !(*m_read_from_misc)(4))throw MyException(sz_unrecognized_wallet_schema);
+		m_MasterSecret= *(m_read_from_misc->value<ristretto255::scalar>());
 		ILogMessage(std::format("\t\tmaster secret: #{}", ro::base58(m_MasterSecret).operator const char* ()).c_str());
 		if(!m_MasterSecret.valid()) throw MyException(sz_cold_wallets_not_yet_implemented, __LINE__, __func__, SrcFilename);
 		auto sizer = new wxBoxSizer(wxHORIZONTAL);
@@ -26,11 +29,9 @@ display_wallet::display_wallet(wxWindow* parent, wxFileName& walletfile) :
 		sizer->Add(m_rSizer, 50, wxGROW, 4);
 		SetSizer(sizer);
 		try {
-			ro::sql read_names_and_keys(m_db,
-				R"|(SELECT	Names.name AS name, Keys.pubkey AS pubkey FROM Names INNER JOIN Keys ON Names.ROWID=Keys.id AND Keys.use=1 ORDER BY LOWER(name), name COLLATE BINARY;)|");
-			while (read_names_and_keys.step() == Icompiled_sql::ROW) {
-				std::string name = read_names_and_keys.column<const char*>(0);
-				auto pubkey = *read_names_and_keys.column<ristretto255::point>(1);
+			while (m_read_names_and_keys->step() == Icompiled_sql::ROW) {
+				std::string name = m_read_names_and_keys->column<const char*>(0);
+				auto pubkey = *(m_read_names_and_keys->column<ristretto255::point>(1));
 				if (m_MasterSecret(name).timesBase() != pubkey)throw MyException(std::string(sz_public_key_of) + name + sz_fails_to_correspond);
 				m_lSizer->Add(
 					new wxStaticText(
diff --git a/src/display_wallet.h b/src/display_wallet.h
index b597c79..00243fa 100644
--- a/src/display_wallet.h
+++ b/src/display_wallet.h
@@ -7,6 +7,8 @@ public:
 private:
 	typedef MenuLink<display_wallet> MenuLink;
 	std::unique_ptr<ISqlite3> m_db;
+	std::unique_ptr <sql_read_from_misc> m_read_from_misc;
+	std::unique_ptr <ro::sql> m_read_names_and_keys;
 	ristretto255::CMasterSecret m_MasterSecret;
 	wxBoxSizer* m_lSizer;
 	wxBoxSizer* m_rSizer;
diff --git a/src/serialization.h b/src/serialization.h
index c35a143..cf6a371 100644
--- a/src/serialization.h
+++ b/src/serialization.h
@@ -75,7 +75,7 @@
 			l = std::size(a);
 			pt = &a[0];
 		}
-		return  std::span<const byte>(static_cast<const byte *>(pt), l);
+		return  std::span(static_cast<const byte *>(pt), l);
 	}
 
 	//	Compile time test to see if a type has a blob array member