// Create network object
int r = loc_writer_add_network(self->writer, &network, string);
- if (r)
+ if (r) {
+ if (r == -EINVAL)
+ PyErr_SetString(PyExc_ValueError, "Invalid network");
+
return NULL;
+ }
PyObject* obj = new_network(&NetworkType, network);
loc_network_unref(network);