The U.S. Supreme Court declined Tuesday to hear software maker SAP AG’s appeal of a $391 million patent infringement judgment in a long-running dispute with Versata Software. According to Versata’s lawyers at McKool Smith, the decision means SAP has just 15 days to pay up. SAP, however, may not see things that way.

“It feels good. It’s been a long, long road,” McKool Smith’s Scott Cole said of Tuesday’s decision. Cole represented Versata through two trials and opposed SAP’s Supreme Court cert petition alongside Jeffery Lamken of MoloLamken.