catastrophic error: cannot open source file "stdio.h"

Dear Experts,

I have recently downloaded and installed the "Intel(R) Parallel Studio XE 2018 Update 1" which seems to lack "stdio.h"? 

For example, if i try to initiate the env with "psxevars.bat intel64", it shows no error:

Intel(R) Parallel Studio XE 2018 Update 1
Copyright (C) 2017 Intel Corporation. All rights reserved.

Intel(R) Compiler 18.0 Update 1 (package 156)

**********************************************************************
** Visual Studio 2017 Developer Command Prompt v15.5.7
** Copyright (c) 2017 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'

however if i try to build some program, for example https://software.intel.com/sites/default/files/openmp_samples_C_win_2017... , it fails with following message:

C:\Users\animeshs\Desktop\openmp_samples>build
icl /nologo /O2 /Qstd=c99 /Qopenmp /F256000000  /Forelease\ src\openmp_sample.c /link /INCREMENTAL:NO /SUBSYSTEM:CONSOLE /MANIFEST:NO  /out:release\openmp_sample.exe
openmp_sample.c
src\openmp_sample.c(54): catastrophic error: cannot open source file "stdio.h"
  #include <stdio.h>
                    ^

compilation aborted for src\openmp_sample.c (code 4)

Any ideas on how to proceed?

Best regards,

Ani