### fatal error C1204:Compiler limit:internal structure overflow

Q: I get this error message when compiling a large source file. What can I do?

A: You have two choices:

1. Upgrade your compiler (preferred)

2. Break your source file up into multiple translation units.

   `my_module.cpp`:

       ...
       void more_of_my_module();
       BOOST_PYTHON_MODULE(my_module)
       {
         def("foo", foo);
         def("bar", bar);
         ...
         more_of_my_module();
       }

   `more_of_my_module.cpp`:

       void more_of_my_module()
       {
         def("baz", baz);
         ...
       }

   If you find that a `class_<...>` declaration can't fit in a single source file without triggering the error, you can always pass a reference to the `class_` object to a function in another source file, and call some of its member functions (e.g. `.def(...)`) in the auxilliary source file:

   `more_of_my_class.cpp`:

       void more_of_my_class(class&lt;my_class&gt;&amp; x)
       {
         x
          .def("baz", baz)
          .add_property("xx", &my_class::get_xx, &my_class::set_xx)
          ;
         ...
       }