Call to undefined function translation_node_nid()

Do you have the i18n and translation modules installed ?

Having the same problem with drupal 6.8, i18n 6.x-1.0-beta6 and link_node 6.x-1.1. Any suggestions?

I also have the same problem with drupal 6.10, i18n 6.x-1.0 and link_node 6.x-1.1.

Someone is watching at this?

Yup, still here :-)
It appears to be a problem with Drupal 6's i18n support, see #283156 for instance.

All I can think of you guys trying is to add the code from the first comment on the above issue to the end of link_node.module, and let me know how that goes.

Here is patch for this issue (thanks to chris_five http://drupal.org/node/283156#comment-1526714).

Change status. I use link_node into site with i18n enabled and multilingual content and this patch working as expected.

ink_node 6.x-1.2-beta1 has been released including this patch. Last chance to say it broke something :-)

Thanks for testing out the fix !