is DDR2 SDRAM high performence controller time-limited?

Hi, all,

I added a processor, a jtag uart, a UART and a ddr2-sdram high performence controller to my SOPC system. When I tried to download the .sof file to my board, the messages said that the .sof file contains one or more time-limited megafuncitons that support OpenCore Plus feature that will not work after the hard ware evalution time expires, and in the message window:

info: SRAM Object File E:sopc/Nios_lab_time_limited.sof contains time-limited megafunction that supports OpenCore Plus feature -- Vendor: 0x6AF7, Product: 0x00A2

But after I downloaded the .sof file, the time left is unlimited.

what can I do to deal with this problem?

Thanks for any help.