[TYPO3-mvc] fluid action link and hidden Objects

[Jonas Götze]

Hi list,

me again :)
I have another weird problem with hidden records.
I do have a list of records (hidden and visible ones) in a table now. I 
created some f:link.action to the editAction for example, which gets the 
object as argument. This (edit and update) works fine for all Objects 
where hidden is 0 - but not for those with hidden = 1.
If I call the link for those I get

Tx_Extbase_MVC_Exception_InvalidArgumentValue

The value must be of type "Tx_Myext_Domain_Model_Foo", but was of type 
"NULL".

I guess creating the Object before it can be passed to my action fails, 
due to its visibility?

Any Ideas?
Thanks to all of you for your generous help! :)

Regards
Jonas