How to set up Doubled Up?

Hi, yes, that is how it should work :).

You did activate the plugin?

It could be that you are running it too early, and the instance doesn’t exist yet. The instance gets created at the ‘plugins_loaded’ action.

Does the widget for it work? It uses that same code, and will run at ‘widgets_init’.

Yes, plugin is activated and the widget works, too.

Shouldn’t it be just fine when I load it some place after this?
global $related; $rel = $related->show( get_the_ID(), true );

Anyway, I just moved the code snippet
global $related_du; echo $related_du->show( get_the_ID() );
to the footer at the very bottom, but still same error.

Just for my understanding, with $related_du it is possible to create a 2nd list with a seperate selection, right?

Yes, for the widget it works here.
Do you use a page template, that you can share? You could mail it to [email protected]

Strange, the page template works here, when I use it as a page template in Twenty Ten theme.

I am a bit lost in what is going on.

A usual way of debugging is to deactivate plugins and switch to a default theme, and see if it works.
If it works, turn everything on one-by-one.

Hi Marcel,

I opened up the plugins page to start debugging and was totally surprised. Till then I didn’t notice that “Related (double up)” comes as a second plugin.

Sorry for all the trouble, but I did just one install and didn’t expect a second plugin here.

Anyway, I activated it and it works perfect! I really love this plugin!!!

Thanks for the plugin and your great support – True 5 Stars!