Hi All

I have just started an  OpenMP application example in VS2017 platform (/* Boost libs/numeric/odeint/examples/openmp/lorenz_ensemble_simple.cpp).  When switch on Properties->C/C++->Language->Open MP Support-> Yes (/openmp), it has a build error

Severity              Code     Description        Project  File              Line       Suppression State

Error     C3016   'i': index variable in OpenMP 'for' statement must have signed integral type           OpenMP-test1     c:\users\renfanluo\source\repos\openmp-test1\openmp-test1\openmptest1.cpp   35        

If When switch off Properties->C/C++->Language->Open MP Support-> Yes (/openmp) to No (/openmp), then the error goes off. However, “No” means OpenMP is switched off, which is not what I want. It is understood that in the for statement, the variables can be assigned with data type before, the errors associated with these user defined for statement will go off but the similar error shown below remain the same for boost header files.

Severity              Code     Description        Project  File              Line       Suppression State

Error     C3016   'i': index variable in OpenMP 'for' statement must have signed integral type           Test-OpenMP2 C:\boost_1_65_1\boost\numeric\odeint\external\openmp\openmp_range_algebra.hpp              72           

Could you guys have any ideas of how to fix this problem?

Best regards

Renfan