(Chron) — The Pennsylvania Liquor Control Board's one-year experiment with wine vending machines at grocery stores is over, at least for now, because of a financial dispute with the contractor, agency officials said Tuesday. Monday was the last day to resolve the dispute with contractor Simple Brands LLC and keep the machines operating, and liquor board CEO Joe Conti said he could not foresee the program being revived. The liquor board maintains that Simple Brands owes the state about $1 million, but Simple Brands has disputed that assessment, saying the liquor board had incurred unnecessary expenses and "improperly" billed the company. Meanwhile, Simple Brands is seeking $81 million from the agency for breach of contract, Conti said.