Matthew, who was Beyonce's manager until they went their separate ways in 2011, tells TMZ, "Unfortunately, Beyonce and Solange had previous engagements which made it impossible for them to attend."
Mathew divorced Beyonce and Solange's mom, Tina Knowles, in 2011, after 31 years of marriage. She had filed for divorce in 2009, after reports surfaced that he was having an affair with actress Alexsandra Wright (paternity tests later showed that he was the father of her son, Nixon, and he was ordered to pay child support).
Mathew filed a lawsuit at the end of June against a British newspaper that published a story suggesting that he had a "bitter rift with his famous daughter."
He claims in court papers that "despite their professional split he remains close to his family and loves nothing more than being a granddad to his daughter's newborn baby girl [Blue Ivy]."