Display associations with webservice

[MadsWeship]

Hi

 

I'm trying to use the display function and limit the displayed results using the webservice, but inserting the 'associations' returns an error both for the method orders and carts. I use the webservice library and orther display variables like 'id' works. The options array is defined as:

 

$opt = array(
    'resource'   => 'carts',
    'display' => 'associations',
    'filter[id]' => '[5]');

 

The error returned is:

 

[CDATA[internal error. To see this error please display the PHP errors.]]

 

Thanks in advance

 

\Mads