modelsim仿真Lattice的FIFO IP核出现的问题

lcyacp

使用Lattice的ispLever软件，利用其IPexpress工具做了一个异步FIFO，并在顶层模块中成功例化，但是在用modelsim做仿真的时候，出现以下问题
# ** Error: (vsim-3043) C:/Modeltech_6.2b/Lattice/Latticework/xp/DP8KA.v(116): Unresolved reference to 'GSR_INST'.
# Region: /IPMC_CPU_test/IPMC_CPU/m0/pdp_ram_0_0_0/EBR_INST
# ** Error: (vsim-3043) C:/Modeltech_6.2b/Lattice/Latticework/xp/DP8KA.v(117): Unresolved reference to 'PUR_INST'.
# Region: /IPMC_CPU_test/IPMC_CPU/m0/pdp_ram_0_0_0/EBR_INST
# ** Error: (vsim-3043) C:/Modeltech_6.2b/Lattice/Latticework/xp/FD1P3BX.v(38): Unresolved reference to 'GSR_INST'.
# Region: /IPMC_CPU_test/IPMC_CPU/m0/FF_61
# ** Error: (vsim-3043) C:/Modeltech_6.2b/Lattice/Latticework/xp/FD1P3BX.v(39): Unresolved reference to 'PUR_INST'.
# Region: /IPMC_CPU_test/IPMC_CPU/m0/FF_61
# Loading C:/Modeltech_6.2b/Lattice/Latticework.UDFDL7E_UDP_X
# ** Error: (vsim-3043) C:/Modeltech_6.2b/Lattice/Latticework/xp/FD1P3DX.v(38): Unresolved reference to 'GSR_INST'.
# Region: /IPMC_CPU_test/IPMC_CPU/m0/FF_60
# ** Error: (vsim-3043) C:/Modeltech_6.2b/Lattice/Latticework/xp/FD1P3DX.v(39): Unresolved reference to 'PUR_INST'.
# Region: /IPMC_CPU_test/IPMC_CPU/m0/FF_60
类似于这样的问题还有一大串，就不贴上来了。
PS：Lattice的library库文件我已经编译，仿真时也选择了该库文件。请各位大侠帮我看看，谢谢。