German ticketing company CTS Eventim AG has submitted a request for arbitration with the International Court of Arbitration of the International Chamber of Commerce and claims Live Nation has breached its contract, according to a Live Nation SEC filing. The agreement to license CTS’ ticketing platform allowed Live Nation to build an in-house ticketing system before its merger with Ticketmaster.

Live Nation called the claims “without merit and inconsistent with the terms of the CTS agreement” and said it has counterclaims that CTS has breached the contract by failing to provide a ticketing platform that meets the minimum contractual standards.

CTS claims the contract allows it to receive a per-ticket license fee regardless of the ticketing platform used by Live Nation in North America. For events in the United Kingdom, CTS claims Live Nation is required to use the CTS platform for all tickets controlled by Live Nation that are not allocated to other sales channels, and it says a portion of tickets are to be sold at the CTS UK website.

Under the agreement, Live Nation warned, the merged company may not be able to fully integrate their ticketing platforms and realize the operational efficiencies otherwise allowed by the merger.