GA: Filter with Product Name won't work: IllegalDimensionMetricCombinationException

Seems like filter with product name don't work.

I set up a real simple query (query for google analytics) with

custom date range
metric = transactions
filter = product name equals "XYZ"

which doesn't work.

When I remove the filter however I get the total amount of transactions. But I'd like to report the total amount of transactions for one specific product.
I also tried it's product sku, it's product category, filtering with avg revenue greater then and so forth.

What am I doing wrong here?