lately I faced strange error with raw format:

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

Error 500:

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

I researched with this problem, but really didn't find the appropriate answer with this... What exactly is wrong with this ?

Joomla version: 1.5.21

Your help could be appreaciated.

Possibly try adding a view for your component e.g. view.raw.php