xilinx布线的一个问题

By: want_king

<p>我用的版本是xilinx ise 6.3i</p>
/t)dq_&h7e3`<p>遇到的情况如下：在综合完 分配管教后进行布局不线 出现</p>
x2cj:lwec7`#t:c,`<p>warning:speedcalc:42 - cannot find referenced model "bel_d_min_period".  this
   generally indicates that there is an inconsistency between versions of the
   speed and device data files.  please check to ensure that the xilinx
   environment variable is set correctly, if the myxilinx variable is set, make
   sure that it is pointing to patch files that are compatable with the version
   of software that the xilinx variable points to.</p>
6kxe_$m9y-n_<p>布局不能完成，谁能告诉我这是怎么回事？或者如何解决？</p>
f&@z^/z$kl<p>谢了</p>
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