仿真时的一个错误

我在进入仿真是有错误提示：** Error: Failure to checkout svverification license feature.
# Unable to check out verification license required for SystemVerilog Assertions. SVA concurrent assertions are disabled.
在仿真中会因错误而停止仿真，提示的错误代码为：assert(op.randomize());
# ----------------------------------------------------------------
# OVM-2.1.1
# (C) 2007-2009 Mentor Graphics Corporation
# (C) 2007-2009 Cadence Design Systems, Inc.
# ----------------------------------------------------------------
# ** Error: Failure to checkout svverification license feature.
# ** Fatal: generator.sv(34): Unable to check out verification license for randomize() feature.
#Time: 180 nsIteration: 1Process: /top/#FORK#65_7f5b9ca File: generator.sv
# Fatal error in Task run at generator.sv line 34
不知道这是不是Questa6.6d的原因?

# ** Fatal: generator.sv(34): Unable to check out verification license for randomize() feature.
怎么都不看提示的?你的lic feature不全。验证环境有sv的assertion没有授权。

问题解决了是Questa额license问题。重新安装一下就好了。估计是之前安装HDL的原因。