请教各位，计算时出现错误，如何解决？
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在做一个锥形件成形仿真时，计算过程出现错误，提示如下：
Error orthopic material element ID xxxx
Material a-fiber direction cannot be computed.
Please check orientation definition. Terminate since material is orthotropic.
不知哪位遇到过类似问题？如何解决？
Error orthopic material element ID xxxx
Material a-fiber direction cannot be computed.
Please check orientation definition. Terminate since material is orthotropic.
不知哪位遇到过类似问题？如何解决？
DLC 
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