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用optistruct做分析时候出现的警告，然后再hyperview看不到效果图是怎么回事
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Messages for the job:
*** WARNING # 312
In static load case 1
the compliance is negative or large 5.968586E+10
Optimization/buckling analysis cannot be performed
due to possible rigid body mode
*** WARNING # 312
In static load case 2
the compliance is negative or large 1.658063E+13
Optimization/buckling analysis cannot be performed
due to possible rigid body mode
*** WARNING # 312
In static load case 5
the compliance is negative or large 1.664343E+13
Optimization/buckling analysis cannot be performed
due to possible rigid body mode
ANALYSIS COMPLETED.
*** WARNING # 312
In static load case 1
the compliance is negative or large 5.968586E+10
Optimization/buckling analysis cannot be performed
due to possible rigid body mode
*** WARNING # 312
In static load case 2
the compliance is negative or large 1.658063E+13
Optimization/buckling analysis cannot be performed
due to possible rigid body mode
*** WARNING # 312
In static load case 5
the compliance is negative or large 1.664343E+13
Optimization/buckling analysis cannot be performed
due to possible rigid body mode
ANALYSIS COMPLETED.
约束问题，比如刚性连接出错，节点没选上等等