Why do I receive an NMAKE U1065 error when compiling a model with Microsoft Visual Studio?

When I generate code from my model and compile the code using Microsoft Visual Studio, I receive an NMAKE error:

NMAKE : fatal error U1065: invalid option '-'

Answer 1

[MathWorks Support Team]

The U1065 error with NMAKE is a generic error which indicates that an invalid option was supplied to some portion of the compilation process. NMAKE is part of Microsoft Visual Studio.

This error can result from numerous environment settings. Some potential sources of erroneous or incompatible settings are listed below.

(1) Examine your Windows environment variables, as some variables, including MAKEFLAGS, are passed directly to NMAKE and can affect compilation. See the following links for more tips:

windows - nmake.exe keeps complaining about flags I'm not giving it. (U1065) - Stack Overflow

I get the following error: NMAKE : fatal error U1065: invalid option '-' (ibm.com)

(2) Check the Compiler Options setting in your model by opening  the Configuration Parameters, navigating to the Code Generation section, and checking the "Make Command" entry. By default, this will read:

make_rtw

Check any additional compiler options specified in this field for validity with Microsoft Visual Studio.