file upload broken on node form on custom page [duplicate]

Question

Possible Duplicate:
D7 Image field upload errors with custom node_add() form

I have a custom page with a node form on it. The problem is that when I try to upload an image I get lots of errors.

The code is like this:

module_load_include('inc', 'node', 'node.pages');
$output = drupal_render(node_add('node_type'));
return $output;

Some of the errors I get are:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'node_form' not found or invalid function name in drupal_retrieve_form() (line 795 of E:\work\my_site\includes\form.inc).
Notice: Undefined index: #node in comment_form_node_form_alter() (line 1193 of E:\work\my_site\modules\comment\comment.module).
Notice: Undefined index: #node in menu_form_node_form_alter() (line 630 of E:\work\my_site\modules\menu\menu.module).

The funny thing is that if I return the form array everything works well.

module_load_include('inc', 'node', 'node.pages');
$output = node_add('node_type');
return $output;

Unfortunately this doesn't help me at all.

This is the same problem as in here but the solution there is not an option for me.

Any ideas? Thanks

Answer 1

Yeah, apparently you should add these line to the menu item array:

'file path' => drupal_get_path('module', 'node'),
'file' => 'node.pages.inc',

it is not enough to just add module_load_include('inc', 'node', 'node.pages'); before printing the form.