When the adverb “however” is used to introduce a contrary statement, does it have to be followed by a comma?
I know in such usage, "however" usually accompanies with a comma, but still I found an exception here:
The director said he was looking for girls six and up, because he didn’t think that someone younger would be able to act. However when he saw Wallis act, he knew he had found the perfect person to play Hushpuppy. He said she was “beyond anything we’d seen before.”
Is that an accidental error, or the use of "however" without a comma does exist in some nonstandard English?