[讨论] gambit 划分网格出现如下错误是什么原因？

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使用gambit划分网格时，显示如下错误：
ERROR：Tetrahedral meshing has failed for volume volume.1. This is uaually caused bu problems in the face meshes. Check the skewnesses of your face meshes and make sure the face mesh sizes are not too large in areas of small gaps.
将网格尺寸减小了也不能划分。但是当只取其中一部分（相当于1/5吧）进行网格划分时，就可以划分网格。按道理说不应该这样的啊@！是怎么回事呢？