diff --git a/msc-plugin/testmain.vcxproj b/msc-plugin/testmain.vcxproj
index 5b1571a..353cb78 100644
--- a/msc-plugin/testmain.vcxproj
+++ b/msc-plugin/testmain.vcxproj
@@ -27,7 +27,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <ItemGroup>
-    <ClCompile Include="dummy.cpp" />
+    <ClCompile Include="..\server\tests\testmain.cpp" />
   </ItemGroup>
   <PropertyGroup Label="Globals">
     <VCProjectVersion>16.0</VCProjectVersion>
diff --git a/server/hasher.h b/server/hasher.h
index 30330dd..22a98e2 100644
--- a/server/hasher.h
+++ b/server/hasher.h
@@ -8,14 +8,16 @@
 // #include "robin_hood.h"
 #include "unordered_dense.h"
 // only works for 64 bit systems
-constexpr size_t _FNV_offset_basis = 14695981039346656037ULL;
-constexpr size_t _FNV_prime = 1099511628211ULL;
+namespace hasher_consts{
+	constexpr size_t _FNV_offset_basis = 14695981039346656037ULL;
+	constexpr size_t _FNV_prime = 1099511628211ULL;
+}
 
 inline size_t append_bytes(const unsigned char* _First) noexcept {
-	size_t _Val = _FNV_offset_basis;
+	size_t _Val = hasher_consts::_FNV_offset_basis;
 	for (; *_First; ++_First) {
 		_Val ^= static_cast<size_t>(*_First);
-		_Val *= _FNV_prime;
+		_Val *= hasher_consts::_FNV_prime;
 	}
 	
 	return _Val;
diff --git a/server/jeaiii_to_text.h b/server/jeaiii_to_text.h
index 63fd9ee..d364108 100644
--- a/server/jeaiii_to_text.h
+++ b/server/jeaiii_to_text.h
@@ -82,7 +82,7 @@ inline char* to_text(char text[], unsigned long long i) { return to_text_from_in
 
 // Copyright (c) 2022 Bill Sun
 
-//#if defined(SIZEOF___INT128) || (defined(SIZEOF___INT128_T) && defined(SIZEOF___UINT128_T))
+#if defined(__SIZEOF_INT128__) 
 constexpr static __uint128_t _10_19 = 10000000000000000000ull, 
     _10_37 = _10_19*_10_19 / 10;
 
@@ -118,4 +118,4 @@ char* jeaiii_i128(char* buf, T v){
     buf = to_text(buf, uint64_t(v % _10_19));
     return buf;
 }
-// #endif
+#endif // INT128
diff --git a/server/libaquery.h b/server/libaquery.h
index 981cd57..e1c7980 100644
--- a/server/libaquery.h
+++ b/server/libaquery.h
@@ -161,4 +161,5 @@ template<> char* aq_to_chars<char*>(void* , char*);
 template<> char* aq_to_chars<types::date_t>(void* , char*);
 template<> char* aq_to_chars<types::time_t>(void* , char*);
 template<> char* aq_to_chars<types::timestamp_t>(void* , char*);
+typedef int (*code_snippet)(void*);
 #endif
diff --git a/server/monetdb_conn.cpp b/server/monetdb_conn.cpp
index b3fbd1e..a7827ae 100644
--- a/server/monetdb_conn.cpp
+++ b/server/monetdb_conn.cpp
@@ -6,7 +6,7 @@
 #include "monetdb_conn.h"
 #include "monetdbe.h"
 #include "table.h"
-
+#undef ERROR
 #undef static_assert
 
 constexpr const char* monetdbe_type_str[] = {
diff --git a/server/server.cpp b/server/server.cpp
index 12f0aed..c2fac13 100644
--- a/server/server.cpp
+++ b/server/server.cpp
@@ -118,7 +118,6 @@ A_Semaphore prompt{ true }, engine{ false };
 #define ENGINE_RELEASE() 
 #endif
 
-typedef int (*code_snippet)(void*);
 typedef void (*module_init_fn)(Context*);
 
 int n_recv = 0;
@@ -193,6 +192,8 @@ constexpr prt_fn_t monetdbe_prtfns[] = {
 };
 
 #include "monetdbe.h"
+#undef max
+#undef min
 inline constexpr static unsigned char monetdbe_type_szs[] = {
     sizeof(monetdbe_column_bool::null_value), sizeof(monetdbe_column_int8_t::null_value), 
     sizeof(monetdbe_column_int16_t::null_value), sizeof(monetdbe_column_int32_t::null_value), 
@@ -626,7 +627,7 @@ int launcher(int argc, char** argv){
     str = std::string("cd ") + pwd + std::string("&& python3 ./prompt.py ") + str;
     return system(str.c_str());
 }
-
+#if !( defined(_MSC_VER) && defined(_DEBUG) )
 extern "C" int __DLLEXPORT__ main(int argc, char** argv) {
 #ifdef __AQ_BUILD_LAUNCHER__
    return launcher(argc, argv);
@@ -680,3 +681,4 @@ extern "C" int __DLLEXPORT__ main(int argc, char** argv) {
    return 0;
 }
 
+#endif // MSCDBG
\ No newline at end of file
diff --git a/server/table.h b/server/table.h
index 8b038f0..3a33136 100644
--- a/server/table.h
+++ b/server/table.h
@@ -24,7 +24,7 @@ namespace types {
 	enum Type_t;
 	template <typename T>
 	struct Types;
-	template <class T1, class T2>
+	template <class T1, class T2, class ...Ts>
 	struct Coercion;
 }
 #endif
diff --git a/server/winhelper.h b/server/winhelper.h
index f39c0b9..463c8bc 100644
--- a/server/winhelper.h
+++ b/server/winhelper.h
@@ -1,7 +1,8 @@
 #ifndef _WINHELPER_H
 #define _WINHELPER_H
+
 #ifdef _WIN32
-static constexpr int RTLD_LAZY = 1;
+static constexpr int RTLD_LAZY = 1, RTLD_NOW = 1;
 void* dlopen(const char*, int);
 void* dlsym(void*, const char*);
 int dlclose(void*);
@@ -20,11 +21,13 @@ class A_Semaphore {
 private:
 	void* native_handle;
 public:
-	A_Semaphore();
+	A_Semaphore(bool);
 	void acquire();
 	void release();
 	~A_Semaphore();
 };
 #endif
 
-#endif
+#endif // WIN32
+
+#endif // WINHELPER