Variable is not a type name error

Your image looks like VS2015, but the _CRTIMP_ALTERNATIVE macro and errno_t type are not used or defined in the 2015 headers that I can find. They are in the VS2012 headers (both are in crtdefs.h). This looks like you are compiling against a mix of header files, with some from one compiler version and some from the other.

Leave a Comment