A financing unit of Cerberus Capital Management L.P. has sued Paul, Hastings, Janofsky & Walker, claiming the law firm gave it bad advice in connection with a loan the private equity firm made last year to a company looking to bring retailer Steve & Barry’s out of bankruptcy.

Ableco Finance LLC, a unit of Cerberus with more than $6 billion under management, filed an amended complaint Friday in Manhattan Supreme Court against its former lawyers seeking more than $55 million it said it lost because of the $125 million loan. Ableco claims it would never have made the loan last year if the Paul Hastings team had advised it that the buyer would not have rights to all of Steve & Barry’s inventory, which Ableco understood would back the loan.