Visual Studio 2017 errors on standard headers

Question

I just upgraded to Visual Studio 2017 Community Edition and I have trouble loading standard header files  I get 507 errors from various header files  Here are some snippets   Some of the errors   Severity    Code    Description Project File    Line    Suppression State Error  active   E1696   cannot open source file  errno h    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cerrno  7    Error  active   E1696   cannot open source file  float h    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cfloat  7    Error  active   E0282   the global scope has no  acosf  RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cmath   629  Error  active   E0282   the global scope has no  asinf  RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cmath   629  Error  active   E0282   the global scope has no  atanf  RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cmath   630  Error  active   E0282   the global scope has no  atan2f     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cmath   630  Error  active   E0282   the global scope has no  ceilf  RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cmath   630  Error  active   E0282   the global scope has no  cosf   RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cmath   631  Error  active   E0282   the global scope has no  coshf  RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cmath   631  Error  active   E0282   the global scope has no  swprintf   RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  21   Error  active   E0282   the global scope has no  swscanf    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  21   Error  active   E0282   the global scope has no  ungetwc    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  21   Error  active   E0282   the global scope has no  vfwprintf  RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  22   Error  active   E0282   the global scope has no  vswprintf  RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  22   Error  active   E0282   the global scope has no  vwprintf   RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  22   Error  active   E0282   the global scope has no  wcrtomb    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  23   Error  active   E0282   the global scope has no  wprintf    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  23   Error  active   E0282   the global scope has no  wscanf     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  23   Error  active   E0282   the global scope has no  wcsrtombs  RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  24   Error  active   E0282   the global scope has no  wcstol     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  24   Error  active   E0282   the global scope has no  wcscat     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  24   Error  active   E0282   the global scope has no  wcschr     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  25   Error  active   E0282   the global scope has no  wcscmp     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  25   Error  active   E0282   the global scope has no  wcscoll    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  25   Error  active   E0282   the global scope has no  wcscpy     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  26   Error  active   E0282   the global scope has no  wcscspn    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  26   Error  active   E0282   the global scope has no  wcslen     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  26   Error  active   E0282   the global scope has no  wcsncat    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  27   Error  active   E0282   the global scope has no  wcsncmp    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  27   Error  active   E0282   the global scope has no  wcsncpy    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  27   Error  active   E0282   the global scope has no  wcspbrk    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include cwchar  28   Error  active   E0282   the global scope has no  wcsrchr    RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools Error  active   E0260   explicit type is missing   int  assumed     RPGWorld    c  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 10 25017 include xtgmath h   212  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML Graphics Glsl inl    40   Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML Graphics Texture hpp 159  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML Graphics VertexArray hpp 64   Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML Graphics VertexArray hpp 72   Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML Graphics VertexArray hpp 88   Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML Graphics VertexArray hpp 104  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML Graphics VertexArray hpp 129  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    58   Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    332  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    345  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    365  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    387  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    387  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    399  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    413  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    413  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    427  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    427  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    456  Error  active   E0757   variable  size t  is not a type name    RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld packages sfml-system 2 4 0 0 build native include SFML System String hpp    456  Error  active   E0020   identifier  rand  is undefined  RPGWorld    c  Users Fazil Documents Visual Studio 2017 Projects Local RPGWorld RPGWorld Blocks cpp 23   Error   C1083   Cannot open include file   corecrt h   No such file or directory    RPGWorld    c  program files  x86  microsoft visual studio 2017 community vc tools msvc 14 10 25017 include crtdefs h   10   Error   C1083   Cannot open include file   corecrt h   No such file or directory    RPGWorld    c  program files  x86  microsoft visual studio 2017 community vc tools msvc 14 10 25017 include crtdefs h   10   Error   C1083   Cannot open include file   corecrt h   No such file or directory    RPGWorld    c  program files  x86  microsoft visual studio 2017 community vc tools msvc 14 10 25017 include crtdefs h   10   Error   C1083   Cannot open include file   corecrt h   No such file or directory    RPGWorld    c  program files  x86  microsoft visual studio 2017 community vc tools msvc 14 10 25017 include crtdefs h   10   Error   C1083   Cannot open include file   corecrt h   No such file or directory    RPGWorld    c  program files  x86  microsoft visual studio 2017 community vc tools msvc 14 10 25017 include crtdefs h   10   Error   C1083   Cannot open include file   corecrt h   No such file or directory    RPGWorld    c  program files  x86  microsoft visual studio 2017 community vc tools msvc 14 10 25017 include crtdefs h   10   Error   C1083   Cannot open include file   corecrt h   No such file or directory    RPGWorld    c  program files  x86  microsoft visual studio 2017 community vc tools msvc 14 10 25017 include crtdefs h   10   Error   C1083   Cannot open include file   corecrt h   No such file or directory    RPGWorld    c  program files  x86  microsoft visual studio 2017 community vc tools msvc 14 10 25017 include crtdefs h   10     I never had this issue with Visual Studio 2015 Community Edition  Am I missing some component from the Installer  Any help would be appreciated  Thank you

User · Answer

This problem may also happen if you have a unit test project that has a different C++ version than the project you want to test.

Example:

EXE with C++ 17 enabled explicitly
Unit Test with C++ version set to "Default"

Solution: change the Unit Test to C++17 as well.

User · Answer

I got the errors to go away by installing the Windows Universal CRT SDK component  which adds support for legacy Windows SDKs  You can install this using the Visual Studio Installer     If the problem still persists  you should change the Target SDK in the Visual Studio Project   check whether the Windows SDK version is 10 0 15063 0   In   Project -  Properties -  General -  Windows SDK Version -  select 10 0 15063 0   Then errno h and other standard files will be found and it will compile

User · Answer

If the problem is not solved by above answer  check whether the Windows SDK version is 10 0 15063 0   Project -  Properties -  General -  Windows SDK Version -  select 10 0 15063 0  After this rebuild the solution   nbsp

User · Answer

I upgraded VS2017 from version 15 2 to 15 8  With version 15 8 here s what happened   Project -  Properties -  General -  Windows SDK Version -  select 10 0 15063 0 no longer worked for me  I had to change it to 10 0 17134 0 and then everything built again  After the upgrade and without making this change  I was getting the same header file errors   I would have submitted this as a comment on one of the other answers but I don t have enough reputation yet

User · Answer

If anyone s still stuck on this  the easiest solution I found was to  Retarget Solution   In my case  the project was built of SDK 8 1  upgrading to VS2017 brought with it SDK 10 0 xxx    To retarget solution  Project- Retarget Solution-  Select whichever SDK you have installed - OK  From there on you can simply build debug your solution  Hope it helps

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