Format raw problem

recently I faced strange error with raw format:

index.php?option=com_content&view=category&layout=blog&id=44&Itemid=80&format=raw

Error 500:

开发者_开发百科

View not found [name, type, prefix]: category,raw,contentView

I googled for this problem, but actually did not find the correct answer for this... So what is wrong with that ?

Joomla version: 1.5.21

Your help would be appreaciated.

---

Perhaps try adding a view to your component e.g. view.raw.php