Message The compiler could not set its locale to the locale-specific native environment. This problem might be caused by an incorrect value for a name defined in your process environment such as "LC_ALL" or "LANG". The "C" locale will be used. Description During start-up, the compiler was unable to set its locale to the locale-specific environment. As part of its initialization, the compiler will issue the call setlocale(LC_ALL, ""). If this call fails, the compiler will set its locale to the "C" locale. In general, this message is output because the locale-specific native environment has been set incorrectly. User Action The best way to determine why the compiler was unable to set the locale is to write a small program that contains the library call setlocale(LC_ALL, "") and then examine the return value from the call.