Message The compiler could not set its locale to either the locale-specific native environment or the "C" locale. Description During start-up, the compiler was unable to set its locale. As part of its initialization, the compiler will issue the call setlocale(LC_ALL, ""). If this call fails, the compiler will try to issue the call setlocale(LC_ALL, "C"). If this call also fails, the compiler will issue this message and abort. User Action The best way to determine why the compiler is failing is to write a small program that contains the same library calls the compiler is making and then examine the return values.