The parent company at Universal Orlando reported lower theme park earnings on Tuesday and it's blaming the pre-launch costs the Wizarding World of Harry Potter - Diagon Alley.

According to Comcast, the cash flow at its Universal parks and resorts slipped during the first quarter to $170 million from a year ago.

Revenues are up at the theme parks from $462 million to $487 million, because visitors at the Orlando and Southern California parks bought more food and merchandise.