我的patran不能开启
$# Session file patran.ses.01 started recording at 25-Sep-09 23:46:16$# Build: 16.0.028 Sun Jun 15 15:50:12 PDT 2008
$# Recorded by: Patran 2008r1
$# FLEXlm initialization complete.Acquiring license(s)...
$# License File: C:\license.dat
$# The license for PATRAN uses an older format that is no longer valid.
$# You must obtain a new license file from your MSC representative.
$# Checkout request rejected by vendor-defined checkout filter.
$# Feature: PATRAN
$# License path:C:\license.dat;
$# FLEXnet Licensing error:-53,234
$# For further information, refer to the FLEXnet Licensing End User Guide,
$# available at "www.macrovision.com".
$# Session file patran.ses.01 stopped recording at 25-Sep-09 23:46:16
一直来都用得不错但不懂为什么前几天开始不能开启，有谁可以帮帮我？
又看到一些是说license到期，要改系统的日期？是什么意思？可以详细解释吗？ license的格式更改了，用个最新的就可以了，否则只能更系统时间了 许可过期，上网上找一个
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