Rotherham are at a “stalemate” with Brighton over their pursuit of Richie Towell.
The Millers have been on a summer-long chase of last season’s loanee, but have had difficulty agreeing a deal, with Towell’s salary understood to be just one of a number of issues.
Portsmouth are also interested in taking the Irishman away from the Seagulls, though Towell would prefer a return to the AESSEAL New York Stadium.
But that does not look like happening any time soon as negotiations have hit an impasse.
Warne said: “I believe we spoke to Brighton yesterday, there has been ongoing constant chats with his agent and with him.
“If we can’t make it work for both parties it just won’t happen. I don’t believe as I sit here now that we are closer than we were a month ago.
“That doesn’t mean that I have given up hope because anything can happen, but it doesn’t seem any more likely.
“If someone else buys him before the transfer window then it’s game over. If it goes past the window and there is the opportunity for the loan then we will try and get him but at the moment it will feel a bit of a stalemate.”