Gen Build Tool: fatal error c1083: Cannot open include file: 'ctype.h':

Products

• Gen - Workstation Toolset
• Gen

Issue/Introduction

Receiving the following error while trying to build a C client using Visual Studio 2015 (VS2015).

C:\Program Files (x86)\Windows Kits\8.1\include\\um\winnt.h(31): fatal error C1083: Cannot open include file: 'ctype.h': No such file or directory
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\cl.EXE"' : return code '0x2'

Resolution

Issue a Repair (or reinstall) for VS2015 and choose the following additional options Universal Windows App Development Tools with Tools and Windows SDK 10.0.10240.