我用sat-8计算，结果说让我查check.out，结果check.out显示如下，请问我的模型出了什么问题？
***** Floor No. 1 *****

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| total information of floor |
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| node information |
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| beam information |
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Warn 76 : Lb < 0.2, Nb= 13 Lb= 0.00

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| column information |
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| other information |
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