Linker error: error LNK2001: unresolved external symbol __imp_printf

On a newly installed compiler, Visual Studio 2013, I get some linker error:
Sample program (for test):
#include <stdio.h>
int main ()
printf("Help");
return 0;
I get some linker errors:
Error 2 error LNK2001: unresolved external symbol __imp_printf F:\ug_info\indices\Project1\Project1\Source.obj Project1
Error 1 error LNK2001: unresolved external symbol __security_check_cookie F:\ug_info\indices\Project1\Project1\Source.obj Project1
Error 3 error LNK2001: unresolved external symbol mainCRTStartup F:\ug_info\indices\Project1\Project1\LINK Project1
I thinks there is a configuration issue..
Any suggestions?

Hi Camiel.Rys,
Thanks for posting in MSDN forum.
Error 3 error LNK2001: unresolved external symbol mainCRTStartup F:\ug_info\indices\Project1\Project1\LINK Project1
I would guess that you may create a wrong project template. Could you try to create a new Win32 Console project following this document?
Walkthrough: Creating a Win32 Console Program (C++)
Best regards,
Shu Hu
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Similar Messages

I'm getting this "error LNK2001: unresolved external symbol _niFgen_SendSoftwareTrigger@4" when I try to make any CNiFgen object.

Hi, I have a working project that has a few classes using the NI5411 APIs and now I want to use CNiFgen classes. After adding Core Components(Advanced Analysis, Common) and NI Device Instrument Drivers(NiFgen) from the Measurement Studio Components Wizard. Even when I try to make an object of CNiFgen(CNiFgen cnf I get the following error:
--------------------Configuration: puzzle - Win32 Debug--------------------
Linking...
NiFgenInterfaceD.lib(NiFgenImpl.obj) : error LNK2001: unresolved external symbol _niFgen_SendSoftwareTrigger@4
Output/puzzle.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
puzzle.exe
- 2 error(s), 0 warning(s)
My APIs version is working fine and so are these CNiFgen classes(I have tried then for a dummy project). But, things start getting nasty when I try to integrate them.
Regards,
Vaibhav.

It looks like you have a typical linking error in VC++. Have you made sure that all of the necessary .lib files are properly linked to?
Also, are you passing any data between your custom classes and the niFGEN classes? These will take different data types unless you have already type cast all of them to work properly together. If they don't share variables, you should be okay.
Jack Arnold
Application Engineer
National Instruments

Unresolved external symbols when building release version of DLL

I have C code which I use to build a DLL project. I have used the same code to create this DLL project in several different solutions.
I am trying to build it in a new solution, and can build the debug version, but I receive a bunch of unresolved external errors when I try to build the release version.
I have painstakingly compared the project release properties with the debug properties, and with the release properties of the same project when I have included it in other solutions. I can't find the problem.
Here are a few of the errors:
1>OLDNAMES.lib(access.obj) : error LNK2001: unresolved external symbol _access
1>Cbase_filedir.obj : error LNK2001: unresolved external symbol __imp__strchr
1>Cusage.lib(CusageWebLog.obj) : error LNK2001: unresolved external symbol __imp__strchr
1>Cbase_filedir.obj : error LNK2001: unresolved external symbol __imp__fopen
Any Suggestions?
Mike

Hi Mike,
Thanks for posting in MSDN forum.
1.Please check project properties->Linker->Additional dependencies has the same libs in both debug and release version. Maybe the lib you added in bebug version but not working in release version.
2.Double check there is no code in something like that #ifdebug ... #endif
3.please use the same character set in your dll or the referenced lib. Both are unicode character set or multi-Bity.
4.Please use the same Runtime library in your dll or the referenced lib. Both are C\C++->code generation->runtime library ->/MD or /MT
Above are some general scenarios, hope this helps some.
Best regards,
Shu Hu
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Unresolved external symbol NumericArrayResize when compiling a DLL at x64 platform using vs2005

I have a dll which is called by Labview through "Call Library Function Node". I want to port this dll to x64 platform from 32bit code which runs well at x86 computer. So, I download the Labview 8.5 evaluation version, replace the orginal referenced header file and library file in 32 bit code, such as extcode.h, fundtypes.h, labview.lib etc. Then I compile the code with Visual Studio 2005, error occurs when link "error LNK2001: unresolved external symbol NumericArrayResize". I don't know why because I really link library labview.lib. Can anyone help me?

Please check the solution in this thread, this may help you solve your problem.
http://stackoverflow.com/questions/925540/how-to-resolve-the-following-linker-errors-in-visual-studio
If you still get the same problem after try the solution, please feel free and let me know.
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OCCI Link problem (Error LNK2019: unresolved external symbol) in VS2012

Hi,
I'm having a hard time with this. I'm trying to implement OCCI within my application. Error I'm getting is:
Error     1     error LNK2019: unresolved external symbol "public: static class oracle::occi::Environment * __cdecl oracle::occi::Environment::createEnvironment(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,enum oracle::occi::Environment::Mode,void *,void * (__cdecl*)(void *,unsigned int),void * (__cdecl*)(void *,void *,unsigned int),void (__cdecl*)(void *,void *))" (?createEnvironment@Environment@occi@oracle@@SAPAV123@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0W4Mode@123@PAXP6APAX2I@ZP6APAX22I@ZP6AX22@Z@Z) referenced in function "private: bool __thiscall ServerDataLoader::getPreSuffixesFromDB(void)" (?getPreSuffixesFromDB@ServerDataLoader@@AAE_NXZ)     P:\code\VizTool\VizPortal\DwgDgnConverter\ServerDataLoader.obj     DwgDgnConverter
Error     2     error LNK1120: 1 unresolved externals     P:\code\VizTool\VizPortal\Debug\DwgDgnConverter.exe     1     1     DwgDgnConverter
Yes, it looks like linking problem,...but for me everything seems set-up.
- Included header files (from instantclient-sdk-windows.x64-11.2.0.3.0.zip)
- Included library path from OCCI download (11.2.0.3.0)
- Added oraocci11d.lib in linker
Please, what am I doing wrong?
Millions of thanks for any kind of feedback ;-)

Have you succeeded? I tried vs2012 and it passed compilation, but gave the run-time error of _crtisvalidheappointer. But the same code runs well with vs2010. I think Oracle needs to publish the new patch for vs2012

C++ Kinect SDK: error LNK2019 unresolved external symbol

I'm receiving the message "error: LNK2019" error when I attempt to run a basic C++ Kinect program. I am running Windows 7 32bit with the Kinect SDK 1.0 and developing in Visual Studio 2010. The included Skeletal Viewer sample works correctly,
so I believe my problem lies in the project configuration. I tried comparing my project config to the sample's, but I can't find any differences so I thought I'd open this up to the forums. Is there any missing or incorrect information that I'm
not seeing? Or is there some other configuration I should be checking?
Thank you in advance.
#include "stdafx.h"
#include <iostream>
#include <windows.h>
#include <NuiApi.h>
#include <stdio.h>
-- Include Directories: --
$(VCInstallDir)include;
$(VCInstallDir)atlmfc\include;
$(WindowsSdkDir)include;
$(FrameworkSDKDir)\include;
$(KINECTSDK10_DIR)\inc;
-- Library Directories --
$(VCInstallDir)lib;
$(VCInstallDir)atlmfc\lib;
$(WindowsSdkDir)lib;
$(FrameworkSDKDir)\lib;
$(KINECTSDK10_DIR)\lib\x86;
These are the specific errors I'm getting:
1>kinectruntime.obj : error LNK2019: unresolved external symbol __imp__NuiImageStreamGetNextFrame@12 referenced in function _main
1>kinectruntime.obj : error LNK2019: unresolved external symbol __imp__NuiImageStreamOpen@24 referenced in function _main
1>kinectruntime.obj : error LNK2019: unresolved external symbol __imp__NuiInitialize@4 referenced in function _main

Is kinect10.lib listed among the libraries in your project's properties, under Linker | Input | Additional Dependencies?
If not, that is the likely cause for the errors.
John
K4W Dev
That was it! Thank you for the quick response and the clear directions.
Since I see you're with Microsoft, I'd like to point out this step was missing from the set up instructions that come with the SDK installation. This guide says to link kinect10.lib by linking
$(KINECTSDK10_DIR)\lib\x86; As we saw here, that's not quite the same thing!
Programming Guide > Using Visual Studio > To Create an Unmanaged Application > Step #5

LNK2019: unresolved external symbol errors.

I am new to JNI and I am experimenting with a C library we have. I could compile the java code and create the .h header file. When I tried to compile the .c file and generate a .dll file, i get the following link errors.
cl -I:C:\projects\NewLogon -LD Logon.c -Felogon.dll -link /LIBPATH:"C:\projects\NewLogon\lib\"
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.3077 for 80x86
Copyright (C) Microsoft Corporation 1984-2002. All rights reserved.
Logon.c
Microsoft (R) Incremental Linker Version 7.10.3077
Copyright (C) Microsoft Corporation. All rights reserved.
/dll
/implib:logon.lib
/out:logon.dll
/LIBPATH:C:\projects\NewLogon\lib
Logon.obj
Creating library logon.lib and object logon.exp
Logon.obj : error LNK2019: unresolved external symbol SAPIHandleRelease referenced in function Java_Logon_logon@8
Logon.obj : error LNK2019: unresolved external symbol SAPILogon referenced in function Java_Logon_logon@8
Logon.obj : error LNK2019: unresolved external symbol SAPIHandleAcquire referenced in function Java_Logon_logon@8
Logon.obj : error LNK2019: unresolved external symbol SAPIExtendedLastErrorGetreferenced in function Java_Logon_logon@8
Logon.obj : error LNK2019: unresolved external symbol _SAPIInit referenced in fu
nction JavaLogon_logon@8
logon.dll : fatal error LNK1120: 5 unresolved externals
I hope the syntax of the command is correct, if not, please let me know. All the unresolved methods are supposed to be in the library files (.lib) located in the "NewLogon\lib" folder. I am not positive about that assumption, is there a way to look at a .lib file and make sure that the methods are defined correctly?
Any help is greatly appreciated and thanks in advance.
Hugo

I am having the same errors, can anyone provide some help with this?

Error 106 error LNK2019: unresolved external symbol

Hi there,
I'm trying to instantiate a Factory object to then get a SchemaValidator from createSchemaValidator in C++.
Here's the code snippet:
Tools::Factory<?, Element> *myFactory = new Tools::Factory<? ,Element>();
SchemaValidator<Element> *mySchemaValidator = myFactory->createSchemaValidator(SchValidatorIdType::SchValCXml, NULL);
Basically, I can't seem to find the right template argument which is supposed to be of type "Context" but I can't figure it out. I tried using "xmlctx" but that leads to the following compiling error:
Error 106 error LNK2019: unresolved external symbol "public: class OracleXml::Parser::SchemaValidator<class Element> * __thiscall OracleXml::Tools::Factory<struct xmlctx,class Element>::createSchemaValidator(enum OracleXml::Parser::SchValidatorIdType,struct xmlctx *)" (?createSchemaValidator@?$Factory@Uxmlctx@@VElement@@@Tools@OracleXml@@QAEPAV?$SchemaValidator@VElement@@@Parser@3@W4SchValidatorIdType@53@PAUxmlctx@@@Z) referenced in function _main TestCppXDK1.obj
I verified I linked my project to oraxml10.lib.
Help?
Thanks!

yeah I checked it but it was set as you said. another interesting thing is I can access "pi" variable in math library. ex:
double a= NI :: CNiMath :: Pi;
but when I use
NI::CNiMath::FFT(fftData,imgData);
I get these errors
mfc3 error LNK2019: unresolved external symbol "public: int __thiscall NI::CniDemo::Access(void)" (?Access@CniDemo@NI@@QAEHXZ) referenced in function "public: static enum NI::MathError __cdecl NI::CNiMath::FFT(class NI::CNiComplexVector &)" (?FFT@CNiMath@NI@@SA?AW4MathError@2@AAV?$CNiComplexVector@N@2@@Z)
mfc3 error LNK2019: unresolved external symbol "class std::auto_ptr NI::global_demo" (?global_demo@NI@@3V?$auto_ptr@VCniDemo@NI@@@std@@A) referenced in function "public: static enum NI::MathError __cdecl NI::CNiMath::FFT(class NI::CNiComplexVector &)" (?FFT@CNiMath@NI@@SA?AW4MathError@2@AAV?$CNiComplexVector@N@2@@Z)Message Edited by alperkal on 12-16-2005 06:00 AM

"error LNK2019: unresolved external symbol" help......!

Hi, i'm still newbie with Oracle 10g and VC8. The problem is i found this LNK2019 error when build my project. Here the steps i take when run VC8 for the first time:
(1). In PROJECT->PROPERTIES->CONFIGURATION PROPERTIES->C/C++->ADDITIONAL INCLUDE, i add the "C:\oracle\product\10.1.0\db_1\OCI\include"
(2). In PROJECT->PROPERTIES->CONFIGURATION PROPERTIES->LINKERS->ADDITIONAL LIBRARY, i add the c:\oracle\product\10.1.0\db_1\OCI\lib\MSVC\vc8 (i've downloaded the OCI for vc8)
(3). I make new project with 1 cpp page with this code:
#include <iostream>
#include <occi.h>
using namespace oracle::occi;
using namespace std;
int main (void)
Environment *env = Environment::createEnvironment();
(4).I compiled this code and succedded
(5).I build this code and i get this error:
------ Build started: Project: Example, Configuration: Debug Win32 ------
Linking...
ok.obj : error LNK2019: unresolved external symbol "public: static class
oracle::occi::Environment * __cdecl oracle::occi::Environment::createEnvironment(enum oracle::occi::Environment::Mode,void *,void * (__cdecl*)(void *,unsigned int),void * (__cdecl*)(void *,void *,unsigned int),void (__cdecl*)(void *,void *))" (?createEnvironment@Environment@occi@oracle@@SAPAV123@W4Mode@123@PAXP6APAX1I@ZP6APAX11I@ZP6AX11@Z@Z) referenced in function _main
C:\Documents and Settings\Frederick\Example\Debug\Example.exe : fatal error LNK1120: 1 unresolved externals
Build log was saved at "file://C:\Documents and Settings\Frederick\Example\Example\Debug\BuildLog.htm"
Example - 2 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
I've tried everything i know. If someone have experienced this error, please let me know the solution. Thanks in advance...
Frederick A

I'm not very new to C++, but I'm new to Visual Studio and working with C++ in MS environment. I'm experiencing the same problem using
Studio 2010 Microsoft Visual Studio 2010
Version 10.0.30319.1 RTMRel
Microsoft Visual C++ 2010 01021-532-2002102-70432
Microsoft Visual C++ 2010
On a Windows 7 Professional 64 bit OS connecting to a 11gR2 (64) database on the same system
I've performed the exact steps in this post and I still receive the link error after performing all the steps identified with the exception that I performed them with respect to the 11gR2 libs & I'm using the libs / includes from this database's home.
I'm sure that I'm missing something trivial, but I'm at a loss to determine what it is. Your assistance in these matters is greatly appreciated.

[need assistance] error LNK2019: unresolved external symbol _CVIXMLLoadDocument

I attempt to load an existing XML file and edit it with Microsoft Visual Studio 2008. Once I add the following function, I get the error LNK2019.
CVIXMLDocument doc = 0;
CVIXMLLoadDocument ("c:\\Temp\\AppTestCmd.xml", &doc);
1>01_cpp_list.obj : error LNK2019: unresolved external symbol _CVIXMLLoadDocument@8 referenced in function _main
1>C:\sc\practice\01_cpp_list\Debug\01_cpp_list.exe : fatal error LNK1120: 1 unresolved externals
I try to add the files and lib mentioned in the following link, but they do not help.
http://forums.ni.com/t5/LabWindows-CVI/unresolved-external-symbol-MSXML-IXMLxxx/m-p/1127380/highligh...
How can I fix it? Thanks!
Here is the code piece. I have only one file in my MSVS project.
============================================================
#include <iostream>
#include <cvixml.h>
#include <msxmldom.h>
#include <cvirte.h> // NI CVI
#include <userint.h> // NI CVI
#include <utility.h>
using namespace std;
int main ()
CVIXMLDocument doc = 0;
CVIXMLLoadDocument ("c:\\Temp\\AppTestCmd.xml", &doc);
return 0;
Solved!
Go to Solution.

Hi,
The link to the following include path has been added by two ways in Microsoft Visual Studio 2008.
C:\Program Files (x86)\National Instruments\CVI2013\toolslib\toolbox
(1) [menu bar, Tools -> Options -> Projects and Solutions -> VC++ Directories -> Include files
(2) [menu bar, Project -> Configuration Properties -> C/C++ -> General -> Additional Include Directories
"cvisupp.lib" and "cviwmain.lib" are added to linker input. I cannot find this one in my NI folders "cvirte.dll".
In my MSVS project, add "cvixml.c" to the Source Files folder and "cvixml.obj" to the Resource Files folder.
With the above settings, it ends up with the following compilation error.
If we roll back to the initial code in the beginning of this discussion thread, we probably just miss one lib file or a few which contains CVIWindows XML function tree.
=========================================================
1>------ Build started: Project: 01_cpp_list, Configuration: Debug Win32 ------
1>Compiling...
1>01_ni_xml.cpp
1>cvixml.c
1>c:\sc2\01_practice_template\01_cpp_list\cvixml.c(153) : error C2440: '=' : cannot convert from 'void *' to 'char *'
1> Conversion from 'void*' to pointer to non-'void' requires an explicit cast
1>c:\sc2\01_practice_template\01_cpp_list\cvixml.c(308) : error C2440: '=' : cannot convert from 'void *' to 'char *'
1> Conversion from 'void*' to pointer to non-'void' requires an explicit cast
1>c:\sc2\01_practice_template\01_cpp_list\cvixml.c(1488) : error C2664: 'MSXML_IXMLDOMNamedNodeMapGetlength' : cannot convert parameter 3 from 'int *' to 'long *'
1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>c:\sc2\01_practice_template\01_cpp_list\cvixml.c(1534) : error C2664: 'MSXML_IXMLDOMNamedNodeMapGetlength' : cannot convert parameter 3 from 'int *' to 'long *'
1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>Generating Code...
1>Build log was saved at "file://c:\sc2\01_practice_template\01_cpp_list\01_cpp_list\Debug\BuildLog.htm"
1>01_cpp_list - 4 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped =========

Error LNK2019: unresolved external symbol

Hi there,
I'm trying to instantiate a Factory object to then get a SchemaValidator from createSchemaValidator.
Here's the code snippet:
Tools::Factory<?, Element> *myFactory = new Tools::Factory<? ,Element>();
SchemaValidator<Element> *mySchemaValidator = myFactory->createSchemaValidator(SchValidatorIdType::SchValCXml, NULL);
Basically, I can't seem to find the right template argument which is supposed to be of type "Context" but I can't figure it out. I tried using "xmlctx" but that leads to the following compiling error:
Error 106 error LNK2019: unresolved external symbol "public: class OracleXml::Parser::SchemaValidator<class Element> * __thiscall OracleXml::Tools::Factory<struct xmlctx,class Element>::createSchemaValidator(enum OracleXml::Parser::SchValidatorIdType,struct xmlctx *)" (?createSchemaValidator@?$Factory@Uxmlctx@@VElement@@@Tools@OracleXml@@QAEPAV?$SchemaValidator@VElement@@@Parser@3@W4SchValidatorIdType@53@PAUxmlctx@@@Z) referenced in function _main TestCppXDK1.obj
I verified I linked my project to oraxml10.lib.
Help?
Thanks!
Message was edited by:
user617632

I'm not very new to C++, but I'm new to Visual Studio and working with C++ in MS environment. I'm experiencing the same problem using
Studio 2010 Microsoft Visual Studio 2010
Version 10.0.30319.1 RTMRel
Microsoft Visual C++ 2010 01021-532-2002102-70432
Microsoft Visual C++ 2010
On a Windows 7 Professional 64 bit OS connecting to a 11gR2 (64) database on the same system
I've performed the exact steps in this post and I still receive the link error after performing all the steps identified with the exception that I performed them with respect to the 11gR2 libs & I'm using the libs / includes from this database's home.
I'm sure that I'm missing something trivial, but I'm at a loss to determine what it is. Your assistance in these matters is greatly appreciated.

Error LNK2019; unresolved external symbol _SDL_SetVideoMode

I had included SDL2-2.0.3 and i have copied the .dll files and did all the setup for the sdl in the directories and linker, but i get these errors....
error LNK2019; unresolved external symbol _SDL_SetVideoMode referenced in function _SDL_main
error LNK2019; unresolved external symbol _SDL_Flip referenced in function _SDL_main
error LNK2019; unresolved external symbol _SDL_WM_SetCaption referenced in function _SDL_main
error LNK1120:3 unresolved externals
any help?

SDL is not a Microsoft or standard library. You should check with people that know the library, but the errors make it look like you are omitting a .lib file.

Error LNK2019: unresolved external symbol GetBestRoute

Hi all, a C++ beginner here. Basically I am trying to see if my network devices are connected to a specific ip address, without actually using sockets or the connect() function (due to project rules), and after thats done, I retrieve the MAC address
of the device that is currently being connected.
However I got this error while compiling my code.
1>ATLProject1.obj : error LNK2019: unresolved external symbol _GetBestRoute@12 referenced in function "bool __cdecl getMacAddress(unsigned long)" (?getMacAddress@@YA_NK@Z)
#include "stdafx.h"
#include "resource.h"
#include "ATLProject1_i.h"
#include "Iphlpapi.h"
using namespace ATL;
class CATLProject1Module : public ATL::CAtlServiceModuleT< CATLProject1Module, IDS_SERVICENAME >
public :
DECLARE_LIBID(LIBID_ATLProject1Lib)
DECLARE_REGISTRY_APPID_RESOURCEID(IDR_ATLPROJECT1, "{4C585367-A6D5-453D-AA45-3DC868030901}")
HRESULT InitializeSecurity() throw()
// TODO: CoInitializeSecurity を呼び出し、サービスのための適切なセキュリティ設定を指定します
// 推奨 - PKT レベルの認証、
// RPC_C_IMP_LEVEL_IDENTIFY の偽装レベル、
// および適切な非 NULL セキュリティ記述子。
return S_OK;
CATLProject1Module _AtlModule;
bool getMacAddress(IPAddr managercom)
bool connection = false;
PMIB_IPFORWARDROW routept = (PMIB_IPFORWARDROW)malloc(sizeof(MIB_IPFORWARDROW));;
GetBestRoute(managercom,0,routept);
//retrieving MAC address code will be added later
return connection;
int main(int argc, char *argv[])
getMacAddress(INADDR_ANY);
extern "C" int WINAPI _tWinMain(HINSTANCE /*hInstance*/, HINSTANCE /*hPrevInstance*/,
LPTSTR /*lpCmdLine*/, int nShowCmd)
return _AtlModule.WinMain(nShowCmd);
Am I lacking something or are there some bad settings in my project?
I am using Windows 7 and Visual Studio 2013, and created my code in ATL project.
Any help and comments are appreciated. Thank you!!!

Hi MrCapybara,
Since you got this issue when compiling my code which seems that this issue is related to your project, and this forum is to discuss and ask questions about the
Visual Studio Debugging tools, Visual Studio Profiler tools, and Visual Studio Ultimate IntelliTrace.
For development issue about C++, I would recommend you post it in C++ forum to get dedicated supports, you could post another thread there.
Regards.
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.

Unresolved external symbols when linking C++ with ni.4882.obj

Moving from 32-bit XP to Windows 7 using Microsoft Visual Studio 2008 C++. When linking with NI-488.2 version 3.0.2 I (ni4882.obj) get the following warning and errors:
1>Linking...
1>ni4882.obj : warning LNK4217: locally defined symbol _time64 imported in function time
1>ni4882.obj : error LNK2019: unresolved external symbol __imp_rand referenced in function LoadFunction
1>ni4882.obj : error LNK2019: unresolved external symbol __imp_srand referenced in function LoadFunction
1>ATP.exe : fatal error LNK1120: 2 unresolved externals
1>Creating browse information file...
1>Microsoft Browse Information Maintenance Utility Version 9.00.21022
1>Copyright (C) Microsoft Corporation. All rights reserved.
Any ideas.
Solved!
Go to Solution.

Hi Guys,
I got this error too recently. Was troubling me a lot. I was using Windows 7 OS, Visual Studio 2010 compiler.
The fix for this is pretty much straight forward and solution lies in the Project settings only.
To my knowledge, with /MDd switch, it causes the compiler to place the library name MSVCRTD.lib into the .obj file.
But with /MTd switch, This option just causes the compiler to place the library name LIBCMTD.lib into the .obj file so that the linker will use LIBCMTD.lib to resolve external symbols. For details, please refer to this MSDN article:
https://msdn.microsoft.com/en-us/library/2kzt1wy3(VS.71).aspx
Its very useful.
Also
MDd stands for Multi-threaded Debug DLL
MTd stands for Multi-threaded Debug
Thanks,
Kiran

Unresolved external symbol __imp__JNI_CreateJavaVM@12 Under JDK 1.6

I'm running on Microsoft Vista using VisualStudio 2008 to create a C++ program that starts a Java process through JNI. I'm using jdk1.6.0_13 which is currently the only JDK on my machine. I started with a very basic program to just boot strap the project, and immediately ran into an issue. I'm linking with the jvm.lib in the JDK lib directory, but I seem to still be missing the import reference for JNI_JavaCreateVM. Any idea why the linker can't pick up the reference?
// Test2JNI.cpp : Defines the entry point for the console application.
#include "stdafx.h"
#include <jni.h>
int _tmain(int argc, _TCHAR* argv[])
     JavaVM *jvm = NULL;       /* denotes a Java VM */
    JNIEnv *env = NULL;       /* pointer to native method interface */
    JavaVMInitArgs vm_args; /* JDK/JRE 6 VM initialization arguments */
    JavaVMOption* options = new JavaVMOption[1];
    options[0].optionString = "-Djava.class.path=lib/maxwell.jar";
    vm_args.version = JNI_VERSION_1_6;
    vm_args.nOptions = 1;
    vm_args.options = options;
    vm_args.ignoreUnrecognized = false;
    /* load and initialize a Java VM, return a JNI interface
     * pointer in env */
    jint result = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
    delete[] options;
    /* invoke the Main.test method using the JNI */
    jclass cls = env->FindClass("com.zenmonics.maxwell.Maxwell");
    jmethodID mid = env->GetStaticMethodID(cls, "main", "([Ljava.lang.String)V");
    env->CallStaticVoidMethod(cls, mid, 100);
    /* We are done. */
    jvm->DestroyJavaVM();
     return 0;
Error
1>------ Build started: Project: Test2JNI, Configuration: Debug Win32 ------
1>Linking...
1>Test2JNI.obj : error LNK2019: unresolved external symbol __imp__JNI_CreateJavaVM@12 referenced in function _wmain
1>C:\Users\Owner\Business\Engagements\Zenmonics\Test2JNI\Debug\Test2JNI.exe : fatal error LNK1120: 1 unresolved externals
1>Build log was saved at "file://c:\Users\Owner\Business\Engagements\Zenmonics\Test2JNI\Debug\BuildLog.htm"
1>Test2JNI - 2 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Link Line =
/OUT:"C:\Users\Owner\Business\Engagements\Zenmonics\Test2JNI\Debug\Test2JNI.exe" /INCREMENTAL /NOLOGO /LIBPATH:"C:\Program Files\Java\jdk1.6.0_13\lib" /MANIFEST /MANIFESTFILE:"Debug\Test2JNI.exe.intermediate.manifest" /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /DEBUG /PDB:"C:\Users\Owner\Business\Engagements\Zenmonics\Test2JNI\Debug\Test2JNI.pdb" /SUBSYSTEM:CONSOLE /DYNAMICBASE /NXCOMPAT /MACHINE:X86 /ERRORREPORT:PROMPT jvm.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib

HI,
I am facing the same problem.
Still you can look at my output
I look for Dir structure. Declared all Env Variables too. And yes I also specified the jvm.dll for it. But still error remains same.
C:\Program Files\xerox\practice\devprac>"c:\Program Files\Microsoft Visual Studio 8\VC\bin\cl.exe" -I"C:\Program Files\Microsoft Visual Studio 8\VC\include" -Ic:\Softwares\JDeveloper\jdk\include -Ic:\Softwares\JDeveloper\jdk\include\win32 -I"C:\Program Files\Microsoft Visual Studio 8\VC\lib" -IC:\Softwares\JDeveloper\jdk\jre\bin\server\jvm.dll -LD devprac_Use5.c -Fedevprac_Use5.exe
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.42 for 80x86
Copyright (C) Microsoft Corporation. All rights reserved.
devprac_Use5.c
Microsoft (R) Incremental Linker Version 8.00.50727.42
Copyright (C) Microsoft Corporation. All rights reserved.
/dll
/implib:devprac_Use5.lib
/out:devprac_Use5.exe
devprac_Use5.obj
devprac_Use5.obj : error LNK2019: unresolved external symbol __imp__JNI_CreateJa
vaVM@12 referenced in function _main
devprac_Use5.exe : fatal error LNK1120: 1 unresolved externals

Linker error: error LNK2001: unresolved external symbol __imp_printf

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